who was crowned king of macedonia when he was 20
Alexander the Great Alexander III of Macedon (20/21 July 356 BC – 10/11 June 323 BC), commonly known as Alexander the Great (Ancient Greek: Ἀλέξανδρος ὁ Μέγας, translit. Aléxandros ho Mégas, Koine Greek: [a.lék.san.dros ho mé.gas]), was a king (basileus) of the ancient Greek kingdom of Macedon[a] and a member of the Argead dynasty. He was born in Pella in 356 BC and succeeded his father Philip II to the throne at the age of twenty. He spent most of his ruling years on an unprecedented military campaign through Asia and northeast Africa, and he created one of the largest empires of the ancient world by the age of thirty, stretching from Greece to northwestern India.[1][2] He was undefeated in battle and is widely considered one of history's most successful military commanders.[3]