Supporters from Sicily , Crete and Thessalonica were joining his campaign .
Having secured control of Egypt , they proceeded to invade Syria and Cyprus while a large fleet under Heraclius the Younger set sail for Constantinople .
Supporters from Sicily , Crete and Thessalonica were joining Heraclius the Younger 's campaign .
Having secured control of Egypt , they proceeded to invade Syria and Cyprus while a large fleet under Heraclius the Younger set sail for Constantinople .