Board Thread:Lore Discussion/@comment-1600847-20130923192222/@comment-24489208-20130923193611

Oblivion say:

"Tiber Septim, Talos, the Dragonborn, Heir to the Seat of Sundered Kings, is the greatest hero-god of Mankind, and worshipped as the protector and patron of just rulership and civil society. Tiber Septim conquered all of Tamriel and ushered in the Third Era and the Third Empire. In his aspect of Ysmir, 'Dragon of the North,' Tiber Septim is also invoked as the patron of questing heroes."

The Ten Commandments of the Nine Divines says:

"5. Talos says: Be strong for war. Be bold against enemies and evil, and defend the people of Tamriel."

In truth it doesn't really say it anywhere, but these sources pretty much say it.