Why were the greek city states open to an attack by Philip II of Macedonia?
2 answers
Phillip II formed a professional army, the Greeks had volunteers. The Greeks were disorganized after the Peloponnese War, the city-states were fiercely competitive, and did not cooperate and help each other. Phillip simply marched over them state by state.
Why were the Greek city-states open to an attack by Philip I of of Macedonia?