The Seljuq campaigns Military_operation in the Aegean refer Name_conferral to the ground and naval actions conducted Action by the Seljuk Turks , chiefly under the leadership of Tzachas of Smyrna against the Byzantine Empire .

A fierce opponent , Tzachas constructed Building the first Turkish navy and captured Conquering a few Aegean islands , supplemented Supply by the conquest Conquering of Smyrna and Abydos .

Tzachas recovered Recovering from his first defeat Conquering and retook Control several islands , but was definitively defeated Conquering at Lesbos by Constantine Dalassenos and John Doukas in 1092 .