First Era

1E 1

The kingdom of Valenwood is established by king Eplear of the Camoran dynasty. This is the first written record in the timeline of the Nords and functions as the starting point of the First Era. The kingdom becomes a buffer between the Ayleid city-state of White-Gold Tower in central Tamriel and the influence of the stronger Altmeri kingdom of Alinor in the Summerset Isles. Over time, the Ayleid territories grow increasingly independent and White-Gold Tower eventually rises as a new autonomous state.

1E 20

The oldest written record of the isle of Artaeum. The sage Voernet is said to have traveled to Artaeum to meet Iachesis, the Ritemaster of the Psijic Order.
Source: Fragment: On Artaeum

1E 68

Two ships from Atmora, largely carrying corpses, land in Skyrim. After this event, Atmora is supposedly uninhabitable.
Source: Pocket Guide to the Empire 3rd Edition: Atmora

Harald, the first historical king of the Nords, is born. Harald is traditionally said to have been preceded by twelve legendary kings, the first of which was the fabled Ysgramor.
Source: Frontier, Conquest, and Accommodation

1E 139-140

A company of men, led by Skorm Snow-Strider, pursue a group of Falmer to the eastern banks of Skyrim's Lake Honnith. Instead of the Falmer, they find a temple of Dragon Cultists and lay siege to the stronghold. A young Tongue breaks down the walls of the monastery but, once inside, Snow-Strider's men find that the inhabitants have committed suicide.
Source: Skorm Snow-Strider's Journal

1E 143

King Harald, the thirteenth of Ysgramor's legendary line, unites the northern regions of Tamriel and forms the kingdom of Skyrim.
Source: Plaques on the Palace of the Kings (Skyrim), Daggerfall Chronicles

1E 221

King Harald dies and his son Hjalmer takes the throne. Dying at the age of 108, Harald is said to have survived all but three of his sons, though the identities of the two sons apart from Hjalmer are unclear. In southeastern Vvardenfell an ancient Nord burial houses the remains of one "Olmgerd The Outlaw", traditionally held to be Harald's bastard son, who presumably died during Skyrim's conquest of Morrowind. The Daggerfall Chronicles describe Vrage, who assumes the throne in 222, as Hjalmer's youngest son, but given the small difference between their consecutive reigns, it is not unimaginable that Vrage instead was Harald's third son and Hjalmer's brother.
Source: Frontier, Conquest, and Accommodation, Daggerfall Chronicles, Pocket Guide to the Empire 1st Edition: Skyrim, Morrowind: Ennbjof's Nord Burial

1E 222

Hjalmer dies and Vrage the Gifted becomes the next king.
Source: The Daggerfall Chronicles

1E 240

Under Vrage, Skyrim expands its borders dramatically into Cyrodiil, Morrowind, and High Rock. To the south, Skyrim challenges the Ayleids and annexes a swath of land in the Nibenay valley. To the west, Skyrim pushes the Direnni, a powerful elf clan, out of most the area now known as High Rock. The arrival of the Nords severely shakes the power balance between the native nedic peoples and the elves, though the Direnni will remain strong for centuries to come. To the east, the nomadic, divided Chimer and the reclusive Dwemer are defeated in a violent campaign, which results in Skyrim conquering the entirety of present-day Morrowind (known to them as Dwemereth or Dunmereth).
Source: Pocket Guide to the Empire 1st Edition: Skyrim, Pocket Guide to the Empire 1st Edition: High Rock, Frontier, Conquest, and Accommodation

1E 242

Inspired by the 'slave queen' Alessia, the enslaved nedic humans in Nibenay start a violent uprising against their Ayleid overlords. The nedes are soon supported by Pelinal Whitestrake, a nearly invincible warrior of unknown origins, with an undying hatred for the elves, who single-handedly decimates the Ayleid armies. With Pelinal on their side, the human rebellion is victorious throughout Nibenay, toppling stronghold after stronghold, each time increasing their number with liberated slaves. The former slaves are also joined by the armies of Skyrim, lead by the demigod winged bull Morihaus. The combined armies form an unstoppable force that quickly conquers all of the peripheral territories of Cyrod. All sights are set on White-Gold Tower, the last and greatest stronghold of the Ayleids.
Source: Shezarr and the Divines, The Song of Pelinal

1E 243

The armies of the rebellion lay siege on White-Gold Tower. Pelinal grows impatient with the slow preparations for the final attack and heads for the city alone. Pelinal calls out Umaril the Unfeathered, king of White-Gold Tower, and slays him in single combat. The remaining Ayleid kings trap and with unknown magics kill Pelinal before attempting to flee the city. Soon after, the armies of Alessia and Morihaus sound the attack and raze the remaining defenses. White-Gold Tower is conquered and the Ayleid empire annihilated. Alessia, with Morihaus as her consort, is declared Empress of Cyrod.
Source: The Song of Pelinal, The Adabal-a, Pocket Guide To The Empire 3rd Edition: All the Eras of Men

Alessia's fledgling kingdom must reconcile vast cultural differences. Over centuries of oppression, her fellow nedes had adopted elements of the Aldmeri pantheon, whereas the Nords, whose support had been instrumental in the success of the rebellion, were vehemently opposed to the worship of the elven deities. In response, the Empress introduces the 'Eight Divines' as an intricate merger of the Nordic and Aldmeri pantheons. Curiously absent from these eight gods is Shezarr (known to the Nords as Shor and to the elves at large as Lorkhan), whose violent, anti-Aldmer image was too diplomatically hazardous for inclusion.
Source: Shezarr and the Divines

Over the next centuries, the Nibenese heartland develops a strong national identity and extends its territory westward by annexing the kingdom of Colovia.

1E 246

The first mention of the name "Daggerfall", from the Nordic conquest of north-western Tamriel.
Source: History of Daggerfall

1E 266

Death of Alessia. Various accounts hold that either Shezarr or Akatosh, both, or Pelinal (despite having died years before) appear at her deathbed to assist the dying empress. Alessia is made the first Cyrodiilic saint and the gods either give her the Amulet of Kings or bind her soul to the jewel, after which it becomes the Empire's most famous heirloom.
Source: The Song of Pelinal, The Trials of Saint Alessia

The Elder Council elects Belharza the Man-Bull as the second Emperor of Cyrodiil.

1E 340

Valenwood starts a trade treaty with the empire of Cyrodiil.
Source: Pocket Guide to the Empire 3rd Edition: Valenwood

1E 355

Clan Direnni, now the only Aldmeri faction to still rule in human lands, again rises in power through political maneuvering and questionable machinations.
Source: Daggerfall Chronicles

1E 358

Emperor Ami-El of Cyrodiil lends his forces to Skyrim in a military campaign against the Direnni Hegemony in the Western Reach. Anti-Aldmer sentiments rise as Skyrim loses more and more of Greater Bretony to the Direnni.
Source: Bethesda Softworks

ca. 1E 361

The Alessian Doctrines are enforced throughout the Cyrodiilic heartland and northern Tamriel. The adherents of the Doctrines follow the teachings of the monkey prophet Marukh, who reportedly receives painful visions of the Slave Queen Alessia, calling for a worldwide overthrow of Aldmeri rule and suppression of the elven elements of the Eight Divines.

Over the following centuries, the "Alessian Order" becomes increasingly powerful, relegating the gods of the various elven and mannish pantheons to the status of saints and lesser spirits, and replacing them with an increasingly abstract and unknowable single god. The Order will continue to dominate Tamriel for the better part of the First Era.
Source: Pocket Guide to The Empire 1st Edition: Cyrodiil, History of Daggerfall

1E 369

The Wild Hunt (a bestial horde of monstrously transformed Bosmer) kills King Borgas of Winterhold, the ruler of Skyrim and last direct descendant of Ysgramor. The Moot - a council with the duty of choosing the next king from qualified members of the royal family - fails to appoint the obvious and capable Jarl Hanse of Winterhold, which starts the disastrous War of Succession. In the following decades, Skyrim will lose its holdings in Morrowind, High Rock and Cyrodiil.
Source: Pocket Guide to The Empire 1st Edition: Skyrim, History of Daggerfall

c. 1E 376

In the continent of Yokuda, the power of the emperors is broken around the year 2012 in the Yoku time reckoning. The emperors remain in place as ceremonial figures, but find their de facto power extremely limited. The continent is plunged into three centuries of virtually continuous civil war between various local factions.
Source: Redguards, Their History and Their Heroes

1E 393

Devils issuing from the ancient Ayleid temple of Malada plague the Cyrod countryside. The Alessian Order attacks the complex and destroys the demons.
Source: The Cleansing of the Fane

1E 416

In Veloth (present-day Morrowind), Indoril Nerevar rallies the warring clans and Great Houses of the Chimer and allies with Dumac of the Dwemer. The two leaders unite their formerly opposed peoples against the occupying forces of Skyrim. In 1E 416, the Nords are driven out of Veloth.

After the war, Dumac and Nerevar resolve to make peace. The new Resdayn is established as a united Chimeri and Dwemeri kingdom with Nerevar and Dumac as its joint leaders. Peace between the Chimer and Dwemer brings an unprecedented prosperity and flowering of both cultures.
Source: Nerevar at Red Mountain, The Battle of Red Mountain, and the Rise and Fall of the Tribunal, Pocket Guide to The Empire 1st Edition: Morrowind

1E 420

Rourken, a clan of the Dwemer, refuses to accept peace with the Chimer. They choose self-exile and leave Resdayn forever. The Rourken eventually arrive in the region now known as Hammerfell and build their new kingdom, Volenfell. According to legend, the leader of the Rourken threw his hammer, Volendrung, across Tamriel, promising to lead his clansmer to wherever it should fall. This mythic image has been depicted on the walls of several ruins in Hammerfell: a mass exodus of golden-clad Dwemer, trudging through the Cyrodiilic forests, Volendrung a falling star in the night sky before them, urging them on.
Source: Pocket Guide to The Empire 1st Edition: Hammerfell, Pocket Guide to The Empire 3rd Edition: Hammerfell

In Skyrim, the War of Succession is finally concluded with the Pact of Chieftains. It is agreed that the Moot will henceforth only assemble when a king dies without direct heirs. Over several decades of strife, the empire of the Nords has lost its territories in Veloth, High Rock and Cyrodiil.
Source: Pocket Guide to The Empire 1st Edition: Skyrim

Olaf One-Eye becomes the High King of Skyrim. His defeat of the dragon Numinex is legendary, although some question the tale.
Source: Olaf and the Dragon

1E 448

Rislav Larich is born to king Mhorus of Skingrad.
Source: Rislav the Righteous

1E 461

The coronation of emperor Gorieus at White-Gold Tower. Representatives of many of Tamriel's nations attend the ceremony.
Source: Rislav the Righteous

Darloc Brae, known as the "Beast of Anequina," takes control of said region.
Source: Anequina and Pellitine: An Introduction

c. 1E 470

First mention of the powerful Altmer artifact known as the Flask of Lillandril.
Source: Elven Artifacts, The Storyline of Redguard

1E 472

The kingdom of Skingrad and Kvatch form an alliance after years of territorial disputes. Rislav Larich is married to Belene, the daughter of Justinius of Kvatch.
Source: Rislav the Righteous

c. 1E 477

Clan Direnni again controls High Rock, as well as large parts of Skyrim and Hammerfell.
Source: The Daggerfall Chronicles

c. 1E 478-479

Conflict between Skyrim and the Alessians. Emperor Gorieus defeats Kjoric the White of Skyrim on the field of battle. Kjoric is killed and Hoag is elected as his successor.

A plague kills King Mhorus and the rest of the royal family of Skingrad. Having survived the plague in Nibenay, Mhorus' son Dorald returns to Skingrad to claim the throne and immediately cedes the region to the Alessian empire. Offended, Rislav rallies the army of Kvatch and defeats his brother in Skingrad, becoming the king of Skingrad. Gorieus finds himself thwarted in his attempts to gain a foothold in Colovia and invades the region. The united forces of Kvatch and Skingrad miraculously manage to defeat the Alessian army.

Inspired by the success of the rebellion, other local rulers in Colovia question the rule of the Alessians and begin to form a cluster of independent regions known as the Colovian Estates. This early division into a headstrong, independent west and a refined, colorful east will in many ways continue to typify Cyrodiil throughout its history.

Other regions that reluctantly underwent strong Alessian influence, such as Skyrim and the Direnni holdings, become restless as well. Ryain Direnni outlaws the Alessian doctrines and harasses the border with Cyrodiil.
Source: Rislav the Righteous, Pocket Guide to The Empire 1st Edition: Cyrodiil

One of the possible dates for the beginning of Wulfharth's reign as king of Skyrim. Other sources indicate he only became king after the death of Hoag in 482.
Source:  Plaques on the Palace of the Kings (Skyrim)

1E 482

The allied forces of the Direnni (led by Aiden Direnni) and Skyrim (led by Hoag Merkiller) defeat the Alessian army in the Battle of Glenumbria Moors.

The battle is costly for all involved. The power of Cyrodiil and the Alessians is greatly diminished in the following decades. The Direnni emerge victorious, but their severe losses create a power vacuum that the emerging human nobility in their lands is quick to fill.

Hoag Merkiller of Skyrim perishes during the battle and the legendary Wulfharth of Atmora (also known as Ysmir) is elected as his successor. He immediately orders a forceful reinstatement of the traditional Nordic pantheon. Alessian temples are destroyed and their priests executed.
Source: The Final Lesson, The Five Songs of King Wulfharth, Pocket Guide to The Empire 1st Edition: High Rock, History of Daggerfall, Rislav the Righteous

1E 498

Within two decades after the Alessian defeat, the Direnni have lost most of their power to the human inhabitants of Greater Bretony. The once-mighty clan now only holds the island of Balfiera in Illiac Bay.

Source: Pocket Guide To The Empire 3rd Edition: High Rock, Daggerfall Chronicles

1E 609

King Thagore of Daggerfall defeats the army of Glenpoint, and Daggerfall rises to become the most powerful kingdom in southern High Rock.
Source: History of Daggerfall

In Yokuda, Mansel Sesnit becomes the Elden Yokeda (military dictator). He manages to control most of the continent for eight years.
Source: Redguards, History and Heroes

1E 617

Mansel Sesnit is assassinated. Randic Torn, a commoner, continues the work of unifying Yokuda.
Source: Redguards, Their History and Their Heroes

c. 1E 660

Skyrim's forces reputedly defeat the orcish god Mauloch (Malacath) in the battle of Dragon Wall. Mauloch flees east and fills the sky with his hatred, an account that can be related to Red Mountain's eruption around these years.
Source: Varieties of Faith in the Empire

1E 668-1E 700

War of the First Council.

The peace between Resdayn's two peoples disintegrates as Voryn Dagoth, the leader of House Dagoth, brings news about a grand Dwemeri project. The tonal architects of the Dwemer, with Kagrenac as their chief, have uncovered the Heart of Lorkhan and are planning to use the dead god's heart as the centerpiece of Numidium, a constructed god that would allow the Dwemer people as a whole to transcend mortal existence. The Chimer strongly disapprove of the plan, considering it extremely blasphemous, while the Dwemer feel their actions should not be judged by the Chimer. Sources about the period of the "War of the First Council" are varied and often somewhat contradictory, with shifting allegiances and various levels of betrayal, some versions even involving the Nords and Orc mercenaries in its final battle. The following are events that are shared among most accounts:

Repeated negotiations between Indoril Nerevar and Dumac fail to restore trust. The two former friends quarrel bitterly and Nerevar's advisors call for war. In the cataclysmic Battle of Red Mountain, the Chimer attack the Dwemer strongholds on the flanks of the eponymous volcano. Nerevar, Dagoth, and a band of companions confront and kill Dumac in his citadel.

During the battle, the Dwemer people mysteriously vanish as a whole, including their exiled cousins of Volenfell. To the present, the exact cause of their disappearance remains a mystery, with various accounts ascribing it to divine vengeance, the powers acquired by the newly formed Tribunal, or to Kagrenac's premature attempt to use his tools on the Heart, resulting in either disastrous failure or, perhaps, success.

Kagrenac's tools are recovered by the Chimer. Nerevar leaves Dagoth to guard the tools in the heart chamber, while he seeks the counsel of the Tribunal, his trusted generals: Almalexia, Vive,c and Sotha Sil. Despite Nerevar's sincere reservations, the three persuade him to preserve and study the tools. All swear an oath upon Azura never to use the tools in the manner the Dwemer had intended. Upon returning to the Heart Chamber, they find Dagoth irrationally reluctant to give up the tools and are forced to take them by force. Dagoth and his retinue manage to escape and are not heard of for many years.

At some point Indoril Nerevar dies, though the circumstances of his death are highly unclear. The official stance of the later Tribunal Temple is that Nerevar succumbed to grave wounds he sustained in his fight with Dumac. Another account, ascribed to Nerevar's lieutenant Alandro Sul and popular primarily among the nomadic ashlanders, holds that Nerevar's three trusted advisors betrayed and murdered their friend, husband, and leader, intending to break their oath.

Some time after the battle, Sotha Sil manages to divine the workings of the tools. The Triunes travel to Red Mountain and make themselves gods. Azura turns the skin of all Chimer gray and their eyes fire-red as a permanent sign of their impunity. The Chimer are henceforth known as the Dunmer, or 'Dark Elves'. Furthermore, Azura prophesies that Nerevar will one day return to end the stolen immortality of the Tribunal. Despite these events, the Tribunal take up their roles as benevolent god-kings and guide their people into an era of unprecedented prosperity.
Source: The Battle of Red Mountain, and the Rise and Fall of the Tribunal, Nerevar at Red Mountain, Kagrenac's Tools, The War of the First Council, The Real Nerevar, Nerevar Moon-and-Star, The Five Songs of King Wulfharth

After the War of the First Council, Red Mountain erupts. Numerous peoples across Tamriel remember the event: to the Nords it was "The Year of Winter in Summer", to the Khajiit, "Sun's Death".
Source: Pocket Guide to The Empire 1st Edition: Morrowind

Iliath Temple, previously a shrine to Azura, is converted to tribunal worship.
Source: Elder Scrolls Online loading screens

c. 1E 720

Frandar Hunding, a major Yokudan hero figure, is born in the year 2356 of the old Yoku calendar.
Source: Redguards, Their History and Their Heroes

c. 1E 737

Randic Torn, the Yoku emperor, dies. The entire Yoku empire is plunged into chaos and the resulting civil war makes the unrests of the previous three centuries pale in comparison.
Source: Redguards, Their History and Their Heroes

c. 1E 760

Divad Hunding, the only son of Frandar Hunding, is born.
Source: Divad The Singer

Note: In the Yoku calendar, the year is 2396. This point in time is often used to synchronize the Yoku timeline with the Tamrielic one. Until the arrival of the Redguards in Tamriel, dates in Yoku history are extrapolations based on this year. The accuracy of this method is debated (the Yoku year may not have been the same length as the Tamrielic one), but the margin of error is likely to be small.

c. 1E 780

Aged sixty, Frandar Hunding has retired to a cave, where he lives as hermit and writes his Book of Circles, a philosophical treatise on the martial arts.

c. 1E 792

The continent of Yokuda sinks after the Hiradirge use the Pankratosword technique. Many of the survivors flee west towards Tamriel.
Source: Pocket Guide to the Empire 3rd Edition: Hammerfell, Lord Vivec's Sword Meeting with Cyrus the Restless

c.1E 800

Earliest known date for the existence of Wayrest.
Source: Wayrest, Jewel of the Bay

c.1E 808

The Yoku reach the shores of Tamriel after fleeing Yokuda, settling the island of Herne while a small group sails on to the mainland. The first Yoku wash over what would later be known as Hammerfell as a 'warrior wave', or 'Ra Gada' in the Yoku language. (This term later comes to be understood as 'Redguard', the Imperial denomination for all inhabitants of Hammerfell). The Ra Gada slaughter beastfolk and local nedic tribes alike to make way for their remnant population at Herne.

Frandar Hunding is among the first to explore the new land, but his party is ambushed by Orcs and Hunding perishes. Divad, Frandar's son, strikes back fiercely and is henceforth recognized by the Redguards as HoonDing, God of Make-Way.

The twofold invasion of Hammerfell lays the foundation for the later division of the nation's population into two broad factions. The Na-Totambu, Yokuda's traditional ruling class, becomes the Crowns, while the vanguard of the Ra Gada become the Forebears..
Source: Pocket Guide to The Empire 1st Edition: Hammerfell, Pocket Guide to The Empire 1st Edition: The Wild Regions, The Origin of Cyrus, A Compilation of Redguard History, Notes For Redguard History, Divad the Singer, Redguards, History and Heroes, The Memory Stone

Gaiden Shinji brings the tradition of honorable battle in Cyrodiil, and the construction of Arena in the Imperial City is started. Unfortunately, he falls during the Siege of Orsinium and never sees it completed. Nonetheless, he is honored as the first Blademaster of the Cyrodiil Arena.
Source: The Elder Scrolls IV: Oblivion

1E 948

The Orcish kingdom of Orsinium comes to be considered a threat to the neighboring kingdoms. King Joile of Daggerfall sends a letter to Gaiden Shinji of the Redguard Order of Diagna, proposing a joint attack. The establishment of this alliance temporarily ends the feuds between the Bretons and the Redguards as they focus on a common foe.
Source: Wayrest: Jewel of the Bay, Pocket Guide to the Empire 3rd Edition: Hammerfell

The aforementioned letter, found in the Annals of Daggerfall, is the first known mention of the city of Wayrest.
Source: Wayrest: Jewel of the Bay

1E 950

The allied forces of Daggerfall, Sentinel, and the Order of Diagna launch an attack on Orsinium. The Orc stronghold proves too powerful to defeat. The "Siege of Orsinium" takes a long 30 years, taking the lives of great warriors and heroes, including Gaiden Shinji.
Source: The Pig Children, Pocket Guide to the Empire 3rd Edition: Orsinium

1E 973

Makela Leki's memory stone is found in the Bankorai Pass of the Wrothgarian Mountains. The stone records her last battle, defending the pass from the army of King Joile of Daggerfall, Hammerfell's ally in the Siege of Orsinium.
Source: The Memory Stone

c.1E 983

With the opening of Bjoulsae River and the scattering of the Orc tribes, open trade between provinces in the Illiac Bay flourishes. Great social and technological boosts, including writing, ensue. Evermore is founded by the River Horse Bretons, and Wayrest continues to grow.
Source: The Royal House of King Eamond, The Daggerfall Chronicles

c. 1E 989

Wayrest in High Rock has become a major city.
Source: The Daggerfall Chronicles

1E 1029

Empress Herta of Cyrodiil strengthens the Colovian West and expands the border of the Cyrodiil Empire to encompass High Rock. She also runs a good diplomacy with the Nordic kingdom of Skyrim, the relationship between the two human kingdoms improves a bit.
Source: Bretons: Mongrels or Paragons?

Hestra documents her new province in the Decretal of Fiefdoms. The Montclaires become barons of Northpoint. An early member of House Guimard of Evermore is mentioned as "Barron Guy Marde of ye Rivver Banke." Another prominent king of the era is Styriche, the Vampire of Verkarth, who is deposed by Hestra and driven southwards to Bankorai Garrison. He and his troops are defeated there by a combination of local soldiers and Hestra's troops.
Source: The Royal House of King Eamond, Bankorai, Shield of High Rock, Elder Scrolls Online loading screens

1E 1033

Empress Hestra (presumably the same person as empress Herta) launches a war against the pirates in Topal Bay.
Source: Pocket Guide to the Empire 3rd Edition: Cyrodiil

Vinicius Imbrex dies.
Source: The Four Abominations

1E 1100

Wayrest becomes a city-state. The downfall of the Orsinium kingdom brings good fortune to the small village of Wayrest. In short time the small village turns to an independent kingdom; a major trade city on the Bjoulsae River. Farangel of the Gardner Dynasty is made the first king of Wayrest.
Source: Wayrest, Jewel of the Bay, The Daggerfall Chronicles

Artan Imbel II marries Eadith Gerimania.
Source: Imbel Genealogy

1E 1200-1E 2208

The Middle Dawn. The Maruhkati Selective, a fanatical sect of the Alessian Order, is frustrated that the aspects of the ancient Aldmeri god, Auriel exist within the Supreme Spirit of the Eight Divines, Akatosh. They channel the Aurbis to mythically remove those aspects, but their doing so breaks the Dragon God of time. The non-linearity of the Dawn Era returns, which is why the "period" is known as the Middle Dawn. Tamriel sleeps through the disaster for 1008 years.

Though there are ample records and testimonies, some scholars maintain that the Dragon Break is a clerical error or an outright fabrication.
Source: Where were you when the Dragon Broke?, The Dragon Break Reexamined

1E 1301

The Sack of Skywatch in Summerset Isle by the Sload from the coral kingdom of Thras. After the Sload a driven from Skywatch, they hold the nearby isle of Errinorne for decades. After they are driven out, the isle's academy is never rebuilt.
Source: Pocket Guide to the Empire 3rd Edition: Summerset, Auridon Explored

1E 1427

The Battle of Duncreigh Bridge, a skirmish between Anticlere and the hamlet of Sensford.
Source: Pocket Guide to The Empire 1st Edition: High Rock

1E 2200

The Thrassian Plague ravages Tamriel, destroying over half its population, especially along its western coast. The plague is released by the Sload from the coral kingdom of Thras. Nobility from Daggerfall, Sentinel, and Wayrest escape to the Isle of Balfiera.
Source: Pocket Guide to The Empire 1st Edition: The Wild Regions

Bendu Olo, the Colovian king of Anvil, sets off to Thras with the All Flags Navy, the largest allied fleet in history, to destroy the Sload. The warlock Syrabane reputedly saves many from the plague. The coral kingdom of Thras is sunk into the sea. After the resounding victory,  Colovia's rising star begins to overshadow the Nibenean east.
Source: Pocket Guide to The Empire 1st Edition: Cyrodiil, Varieties of Faith in the Empire

1E 2260

The Thrassian Plague nearly wipes out Khajiit society, leaving only two states where there were previously 16: Pa'alatiin (Pellitine) and Ne Quin-al (Anequina). High Rock likewise suffers. The noble and merchant classes of Shornhelm take refuge in the caves beneath the city, emerging five months later to find most of their population dead.
Source: Pocket Guide to the Empire 3rd Edition: Elsweyr, Elder Scrolls Online loading screens

Baron-Captain Olsien Guy Mard is a member of the All Flags Navy.
Source: The Royal House of King Eamond

1E 2321

The War of Righteousness breaks out in Cyrodiil. Having lost its hold on the Colovian Estates, the widespread ruling elite of the Alessian Order begins infighting. Over some ten years of conflicts, the Order that ruled a large part of Tamriel for many centuries loses its other territories and disintegrates completely. The Nibenean Valley reverts to a mercantile-magocracy, but is not reunited with Colovia for centuries to come.
Source: Pocket Guide to the Empire 1st Edition: Cyrodiil, The Cleansing of the Fane

Captains of House Tharn fight on both sides of the conflict, and, at its end, General Turpis "Volte-Face" Tharn claims the family's now traditional holdings. He takes the title Earl of Outer Cheydinhal and marries a nice of Bendu Olo.
Source: House Tharn of the Nibenay

1E 2702

The entire population of Wayrest city is forced to move into the walled estate of the Gardners as protection against pirates, Akaviri raiders, and the Thrassian plague.
Source: Wayrest, Jewel of the Bay

1E 2703

A large invasion force from the Tsaesci of Akavir threatens Tamriel. A Colovian-born man named Reman raises an army in the Estates and convinces the forces of the Nibenay Valley to join his cause. The combined armies hold back the invaders throughout northern Tamriel, who eventually surrender at Pale Pass in the mountains between present-day Skyrim and Cyrodiil. Having established a new sense of unity between western and eastern Cyrodiil, Reman is crowned the first emperor of the Second Empire of Men. He accepts the surrender of the Akaviri to strengthen the Imperial army against the Altmer.
Source: Pocket Guide to The Empire 1st Edition: Cyrodiil

The Akaviri Dragonguard become Reman's personal guard, later transforming into the Blades.
Source: Rise and Fall of the Blades

1E 2714

Valenwood falls to the Cyrodiilic Empire.
Source: Pocket Guide to the Empire 3rd Edition: Valenwood

1E 2762

Death of Reman I of Cyrodiil.
Source: The Elder Scrolls IV: Oblivion

1E 2794

Birth of Reman II.
Source: The Elder Scrolls IV: Oblivion

1E 2801

Emperor Kastav orders the Dragonguard of Sky Haven Temple to take hostages from the Jarls of Markarth and Hroldan to ensure they meet their conscription quota.
Source: Annals of the Dragonguard

1E 2804

Rebellion breaks out in Winterhold and the Dragonguard violate orders to suppress it. Sky Haven Temple is cut off from the supply lines by order of the Emperor, but manages to make arrangements with the Reachmen.
Source: Annals of the Dragonguard

1E 2805

Sky Haven Temple is besieged after Kalien, an Akaviri, but not a member of the Dragonguard, sacks the city of Winterhold.
Source: Annals of the Dragonguard

1E 2806

According to the Annals of the Dragonguard, Reman II has already assumed the throne of the Cyrodiilic empire. Reman's tomb in Sancre Tor gives a later date for his coronation (see below). 
Source: Annals of the Dragonguard

1E 2811

The Empire decides to conquer Black Marsh, citing desire for resources and the need to civilize the locals. Lead by Augurius Bucco and the 4th Legion, they win a number of decisive early victories, including the Battle of Argonia. It is the first time that humans have laid claim to the Marsh.
Source: Pocket Guide to the Empire 3rd Edition: Argonia; Stormhold, City of Shadowfen; Imperial Incursions: Why a Swamp?; The Blackwater War, volume 1

1E 2812

Reman II is crowned Emperor. This date, found on Reman's tomb in TESIV: Oblivion, comes later than the date given in Annals of the Dragonguard (see above). 

A year after the Battle of Argonia, Black Marsh is formally incorporated into the Cyrodiilic Empire. Some legionnaires remain stationed in the province to continue subduing the locals.
Source: Pocket Guide to the Empire 3rd Edition: Argonia, Imperial Incursions: Officer's Lament

Construction begins on Alduin's Wall in Sky Haven Temple. Craftsmen from all over Tamriel are being overseen by the Dragonguard's master.
Source: Annals of the Dragonguard

1E 2813

Cyrodiilic becomes the language of all legal documents, replacing High Elven. Cyrodiilic is the ancestor of the modern Tamrielic language.

1E 2815

The Grandmaster of the Blades visits Sky Haven Temple to check on the progress of Alduin's Wall, which is only half finished.
Source: Annals of the Dragonguard

1E 2818

Alduin's Wall is completed at Skyrim's Sky Haven Temple and inaugurated by Reman II. It is considered one of the finest examples of late 2nd era Akaviri sculpture.
Source: Annals of the Dragonguard

The 350 Imperial troops remaining in Black Marsh are killed while retreating from the province in what is known as the Xi-tsei Masacre. The Fourth Legion of Black Marsh is reconstituted under General Regulus Sardecus.This begins the second campaign in the Blackwater War.
Source: The Blackwater War, volume 4

Governor Pomptinus is appointed the ruler of Elinhir and Craglorn by the Second Empire.
Source: Elder Scrolls Online loading screens

1E 2837

Following over 35 years of conflict, the Blackwater War draws to a close when the Argonian forces abruptly lay down arms and go back to civilian life. Although the region's interior remains unconquered, the Empire formally claims Black Marsh as an Imperial Province.
Source: Pocket Guide to The Empire 1st Edition: The Wild Regions, The Blackwater War, volume 7

c. 1E 2840

The Cyrodiil Empire launches its invasion of Morrowind, the last region on Tamriel that is not under the rule of the Reman Dynasty. This is the start of the infamous Four Score War, a war that lasted for about 80 years.
Source: 2920, Last Year of the First Era.

1E 2851

Reman II of Cyrodiil dies.
Source: The Elder Scrolls IV: Oblivion

1E 2871

The dragon Krahjotdaan is killed by the Dragonguard in the southern Jerall Mountains.
Source: Atlas of Dragons

1E 2877

Reman III is crowned as emperor of Cyrodiilic Empire.
Source: The Elder Scrolls IV: Oblivion

Beginning War of the Uvichil, a war between the Altmer of the Summersets and the Sloads of Thras.

Source: Pocket Guide to the Empire 3rd Edition: Summerset

The War of the Uvichil ends.

Source: Pocket Guide to the Empire 3rd Edition: Summerset

1E 2920

After a long and exhaustive war, the Cyrodiilic empire forces Morrowind to surrender. Vivec negotiates the terms of surrender and the further relationship between the Empire and Morrowind. In the same year, the Daedric Prince had destroyed large parts of Mournhold, the capital of Morrowind, before being banished by Almalexia and Sotha Sil.

Reman III and his heir are assassinated within the year and the Reman dynasty comes to an end. The Akaviri Potentate Versidue-Shaie continues to rule in their stead and declares the beginning of a new era.
Source: 2920, The Last Year of the First Era