Empire's Victory is the third book of the Roman Sky series that follows Cillian, a young Roman with Gael-Goth roots, as he rises up the ranks of an airborne legion in a sixth century Roman Empire that has airships. Cillian now commands an airship, its crew, and the soldier-archers it carries. After two years of battling Persians in the east, the legion is sent west and stops at Constantinople for inspections and refits. While there, Cillian is to be celebrated by Emperor Justinian for saving the life of his cousin, Germanus at the Battle of Dara. But the streets of Constantinople are clogged by the protests of the Blues and Greens, supporters of chariot teams known by those colours, grow violent as their grievances and demands increase. The wealthy backers of the Blues and Greens—most of them senators—incite the mobs to riot with claims that the Emperor's election was fraudulent and his reforms the cause of their woes. The riots become something much worse that threatens the stability of the Empire. And Cillian and his legion are about to be caught up in this unexpected and vicious conflict.