Philip II ruled Macedonia from 359 to 336 bc. During this time he battled and subdued the Greeks (the major victory was at Chaeroea in 338.) After his assassination in 336 bc his son Alexander at the age 20 became King of Macedonia. In 334 Alexander began his invasion of Persia in order to fulfill his father's plan to punish Persia for its dominance of Greece. Alexanders campaigns took him through Persia, Syria, Egypt, Afghanistan and finally India. In 323 he died while preparing a campaign to the Arabian peninsula.