In 1216, Mstislav mustered a large coalition of princes of Rus' which defeated Vladimir-Suzdal on the Lipitsa River. After that he installed his ally Konstantin of Rostov as Grand Prince of Vladimir and married his own daughter to Yaroslav of Vladimir, who had fortified himself in Torzhok. In the meantime, his other enemies had him deposed in Novgorod, and Mstislav had to abandon Northern Rus for Halych. In 1219, he concluded peace with his chief rival, Danylo of Halych, who thereupon married Mstislav's daughter Anna.