 In 1090/91, the Byzantines under Constantine Dalassenos recovered Chios.Undeterred, Tzachas rebuilt his forces, and resumed his attacks, even proclaiming himself emperor ("basileus") and seeking to conclude an alliance against Alexios I with the Pechenegs in Thrace for a joint attack on Constantinople.In 1092, Dalassenos and the new "megas doux", John Doukas, were sent against Tzachas, and attacked the fortress of Mytilene on Lesbos.