Anna Palaiologina Kantakouzene, the regent of Epirus had invaded Thessaly, but was now forced to retreat by Guy's forces. Guy proved less successful, however, in restraining the Catalan Company, which burst into Thessaly in 1306 and proceeded to ravage the region for some three years. By the time Guy died in 1308 John had just come of age and resented the attempt of the new duke of Athens, Walter of Brienne, to maintain Athenian protectorate over Thessaly.
Anna Palaiologina Kantakouzene, the regent of Epirus had invaded Thessaly, but was now compelled to withdraw by Guy's forces. Guy proved less effective, however, in curbing the Catalan Company, which burst into Thessaly in 1306 and proceeded to pillage the region for some three years. By the time Guy died in 1308 John had just come of age and resented the attempt of the new duke of Athens, Walter of Brienne, to maintain Athenian guardianship over Thessaly.