After the failure of the co-emperor Michael IX to stem the Turkish advance in Asia Minor in 1302 and the disastrous Battle of Bapheus, the Byzantine government hired the Catalan Company of Almogavars (adventurers from Catalonia) led by Roger de Flor to clear Byzantine Asia Minor of the enemy. In spite of some successes, the Catalans were unable to secure lasting gains. Being more ruthless and savage than the enemy they intended to subdue they quarreled with Michael IX, and eventually openly turned on their Byzantine employers after the murder of Roger de Flor in 1305; together with a party of willing Turks they devastated Thrace, Macedonia, and Thessaly on their road to Latin occupied southern Greece. There they conquered the Duchy of Athens and Thebes.