(Tsay-see)
The serpentfolk of Akavir, little is known of them among the scholars of Tamriel due to their minimul interaction between the continents. All that is known of Akavir and the Tsaesci comes from three sources.
In the First Era, after the fall of the Alessian Empire, the Tsaesci came to Tamriel with an invasion force. Their intent is still a mystery, but the prevalent belief today revolved around their search for a figure known as Dragonborn. Dragons were reportedly in Akavir before they came to Tamriel and were presenting a problem to the people of Akavir. They wanted to recruit the Dragonborn to help them. This theory, while the theory that holds the most belief in our world, is still a bit of a long shot as the Tsaesci did not leave Tamriel with the Dragonborn. Instead, upon meeting Reman Cyrodiil and learning what he was the Tsaesci instead remained in Tamriel and pledged themselves to him. Over time, they founded the Dragonguard, which would later become known as the Order of the Blades.
In the Second Era, after the line of Reman died off, the Empire became led by an Akaviri Potentate, one of the Tsaesci themselves, and became known for both beneficial and harmful things in the history of Tamriel. Eventually, the Potentate would be assassinated by the founding members of the Dark Brotherhood, and then Tiber Septim would rise amidst the other warring warlords to take control of the Empire and forge the beginning of the Third Era.
During the Second Era, as well, a different race from the continent of Akavir invaded Tamriel as well. But, the Tsaesci still had a minor presence in Tamriel at this point, and were helpful in identifying this new threat.
In the Third Era, Uriel V, of the Septim line, led expeditions to the east, locating new islands to be added to the bounds of the Tamrielic Empire, but also, finding shores in Akavir to land and begin explorative missions into the lands of the Tsaesci and other Akaviri peoples. Little has survived to this day of those expeditions, but what is known, is that some Tsaesci ruins were used as settlements, but that these settlements were ultimately abandoned as the wildlife and Tsaesci themselves proved to be too hostile to maintain any kind of standing force in the new territory.
What little has survived the expeditions and what records were kept during the Cyrodiil Dynasty, are all that we have to draw informaiton about the Tsaesci and Akavir at large.