Nogai and Tokhta soon found themselves embroiled in a deadly rivalry; while they cooperated in raids against rebellious Rus' principalities, they remained in competition. Tokhta's father-in-law and wife often complained that Nogai seemed to consider himself superior to Tokhta, and Nogai repeatedly rejected any demands Tokhta made of him to attend his court. They also disagreed over the policy of trading rights for the Genoese and Venetian cities in Crimea. Two years after Nogai installed Tokhta, their rivalry came to a head and Tokhta set out to gather his supporters for a war against Nogai.