The city of Thebes did at length rebel. Philip had conquered this city in former struggles, and had left a Macedonian garrison there in the citadel. The name of the citadel was Cadmeia. The officers of the garrison, supposing that all was secure, left the soldiers in the citadel, and came, themselves, down to the city to reside. Things were in this condition when the rebellion against Alexander's authority broke out. They killed the officers who were in the city, and summoned the garrison to surrender. The garrison refused, and the Thebans besieged it.