The Tiber Wars were a series of wars during the Second Era, in which the Septim Empire led a campaign to conquer every province of Tamriel. The Wars started in 2E 854 or 2E 855 and lasted for 42 years, with the end of the Tiber Wars marking the start of Third Era and Tamriel standing united under the Imperial banner.
The Tiber Wars were inspired when the Greybeards told Tiber Septim that he was destined to become the Emperor of Tamriel. After the death of Cuhlecain, Tiber Septim took his role, and started his conquest of Tamriel in the 855th year of the Second Era or in the 854th year of the Second Era.] Tiber himself, however, found the initial administration of a fully united Cyrodiil a time-consuming task, and, because of this, the Underking dealt with the Imperial expansion into Skyrim and High Rock.
Despite Skyrim's armies swearing loyalty to Tiber Septim after their defeat at Sancre Tor, Skyrim itself had not joined the Empire during Cuhlecain's rule. Tiber Septim invaded Skyrim with his Legions, one of his commanders was known as Beatia of Ylliolos, and had been ambushed by the Nords after a meeting with the Emperor. The exact date as to when Skyrim fell to the Empire is unknown, but it is known that it was prior to 2E 862, since that is when Thassad II died and Septim invaded Hammerfell.
High Rock had lived on pretty well after the fall of the Reman Empire, but due to it existing of multiple kingdoms, it was easily conqeured by Tiber's armies. The official date on which High Rock was conqeured by the Empire is also unknown, though it was before 2E 864, by which point the Bretons were considered to be "solidified" by the Empire.
Hammerfell was the last of the human kingdoms to fall to the Empire. Following the death of High King Thassad II, Hammerfell had been plagued by a civil war between the major political factions of Hammerfell: the Crowns, led by Thassad's son A'Tor, and the Forebears, led by Sentinel ruler Baron Volag. When the civil war was slowly being won by the Crowns, the Forebears signed a pact with Septim, allowing his armies to march into Hammerfell, crush the Crowns, and claim Hammerfell as part of the Empire. The Imperials conqeured Hammerfell with ease, though began to treat the province as their own property, causing Volag to disappear from Sentinel.
The fateful Battle of Hunding Bay at Stros M'kai was the only event where the Crown forces matched the might of the Empire, resulting in New West Navy Commander Amiel Richton to send Nafalilargus to obliterate the Crown forces during the battle, killing Prince A'Tor in the process. After the Imperial victory there, Richton became provisional governor of Stros M'Kai. The Redguard deity HoonDing arrived in the form of Cyrus, a Redguard mercenary, and the Soul Sword, an artifact imbued with A'Tor's life force. Under Cyrus' and Restless League leader Basil's guidance, a successful rebellion was launched on Stros M'kai, overthrowing Richton's government. Another rebellion followed in Sentinel, led by the forces of Baron Volag. As a result of the rebellions, Tiber Septim came to Stros M'kai and negotiated the terms of the Treaty of Stros M'kai with the rebel leader of Stros M'kai, Iszara and the rebel leader of Sentinel.
Black Marsh and MorrowindEdit
When the invasion of Black Marsh occured is not known, but it is known that there was fighting between the Legions and the Argonians in 2E 861, it is also known that Black Marsh fell prior to Hammerfell. It was said that Tiber Septim himself thought twice before conqeuring Black Marsh, the border regions fell easily to his Empire, but he wisely decided to avoid strategically unimportant inner swamps, and thus met with little resistance. Even under Imperial rule, the inner swamps were still controlled by the Argonians while the Empire controlled the coasts and borders of the province. Eventually, Black Marsh joined the Empire, mainly through a treaty.
Morrowind became an Imperial province after Hammerfell had fallen. Initially, the Temple and the Great Houses of Redoran, Dres and Indoril wanted to fight until the death, Telvanni remained neutral and House Hlaalu proposed accomodation. There were several battles between Morrowind and the Empire, one of which laid waste to Mournhold, now called Almalexia. The situation changed, when Vivec appeared and announced his negotiation of a treaty with the Emperor, which allowed the Dunmer to keep most of their traditions while joining the Empire. The Temple greeted the announcement with an awkward silence, Indoril and Dres still said they would resist to the death, while Redoran gladly took the oppertunity to not have to fight the Legion unsupported. Redoran then switched sides, and backed House Hlaalu's proposal of accomodation. Telvanni, seeing which way the wind blew, joined Redoran and Hlaalu in their accomodation. Despite this, the Lord High Councillor of Morrowind, an Indoril, refused the treaty and refused to step down. Because of this, he was assassinated and replaced by a Hlaalu.
Not much is known about how Elsweyr fared during the Tiber Wars, however, it is known, that Elsweyr had an agreement with the Aldmeri Dominion, like the Maormer and a few Reachmen. It is also known that the Third Legion sacked Senchal, a city in the far south of Elsweyr. Smuggling businesses ran from Elsweyr into the Empire, though they were later cracked down on after the Empire had strengthened their grip on the area.
Second Aldmeri DominionEdit
Valenwood and the Summerset IslesEdit
The Thalmor increased its hold on Valenwood during the founding of the Third Empire. Savage Bosmer tribes fought with the Estates along the Strid River. However, when the Empire stood united these skirmishes stopped. After the attacks stopped both sides waited on either side of the Valenwood border for the decisive battle. On the occasions that the Dominion probed the Empire's defenses, the Legion sent them back in tatters. The Colovians even took to calling them the ''Old Mary Dominion'' due to the womanly offensives of its Elven soldiers. The situation at sea, however, was another story, as the Dominion terrorized the southern waters from the Cape of the Blue Divide to the Topal Bay. Tiber Septim later used the Numidium to conqeur the Aldmeri Dominion. 
Imperial force usedEdit
The recorded Imperial forces during the Tiber Wars are as follows:
- The Elder Scrolls Adventures: Redguard (during the conquest of Hammerfell)
- ↑ 1.0 1.1 1.2 Brief History of the Empire, Book I
- ↑ 2.0 2.1 2.2 Ice and Chitin
- ↑ Timeline page on the Official Archived Redguard Website
- ↑ 4.0 4.1 The Arcturian Heresy
- ↑ Etched tablets on the Throat of the World
- ↑ Battle of Sancre Tor (Book)
- ↑ 7.0 7.1 7.2 7.3 7.4 7.5 On Morrowind
- ↑ Pocket Guide to the Empire, Third Edition: High Rock
- ↑ 9.0 9.1 S'rathra's Page on the Official Archived Redguard website
- ↑ 10.0 10.1 Intro of The Elder Scrolls Adventures: Redguard
- ↑ 11.0 11.1 Pocket Guide to the Empire, First Edition: Hammerfell
- ↑ Varieties of Faith in the Empire
- ↑ 13.0 13.1 Events of The Elder Scrolls Adventures: Redguard
- ↑ 14.0 14.1 14.2 Attrebus' page on the Official Archived Redguard Website
- ↑ Pocket Guide to the Empire, Third Edition: Black Marsh
- ↑ A Short History of Morrowind
- ↑ Biography of Barenziah, v 1
- ↑ 18.0 18.1 18.2 18.3 Pocket Guide to the Empire, First Edition: Aldmeri Dominion
- ↑ Pocket Guide to the Empire, First Edition: Elsweyr Confederacy
- ↑ Anonymous Letters
- ↑ Letter from the Underking
- ↑ Pocket Guide to the Empire, First Edition: Cyrodiil
- ↑ Richton's page on the Official Archived Redguard Website