According to Niketas Choniates's chronicle, "the Vlachs, who had heard rumors" of the escape of Andronikos Komnenus (a rebellious cousin of the Byzantine Emperor Manuel I), captured him in 1164 at the borders of Halych. Choniates reported that Vlachs, Slavs and Cumans also inhabited the lands between the Carpathians and the Lower Danube, and the Vlachs' cooperation with the Cumans against the Byzantine Empire is well-documented. According to Anna Comnena, local Vlachs showed "the way through the passes" of the Balkan Mountains to Cumans who invaded the Byzantine lands south of the Lower Danube in 1094. Peter and Asen, leaders of the 1186 rebellion of the Bulgarians and Vlachs against Byzantine rule, crossed the lower Danube to seek assistance from the Cumans in the summer of 1186 and returned "with their Cuman auxiliaries" to continue the fight. "Cumans, with a division of Vlachs, crossed" the lower Danube and invaded Thrace in 1199.