As a younger son of Amyntas III, he never expected to rule Macedonia--but then his older brother died in battle
He tried to return but was killed in 407 in an attempt (his enemies said) to ... his 
personal rule, and one need look for no subtler motive than the prestige .... Cyrus
the younger brother of the new Persian king, Artaxerxes II .... Amyntas III, who 
had succeeded to the Macedonian throne about .....