Wrex's Krogan Empire―also called the Hordes of Tuchanka, Krogan Clans, or simply the Second Krogan Empire―was a government was formed by Urdnot Wrex and his mate Urdnot Bakara in the aftermath of the Reaper War. The Empire serves as the primary political body of Tuchanka and all krogan tribes, with other clans petitioning for membership. Although many clans maintain control over their respective domains, the krogan nevertheless answered to Wrex, who has since became Overlord.