Alexander III of Macedon 20/21 July 356 BC – 10/11 June 323 BC), commonly known as Alexander the Great, was a king of the ancient Greek kingdom of Macedon 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 20. He spent most of his ruling years on an unprecedented military campaign through Asia and northeast Africa, and by the age of thirty, he had created one of the largest empires of the ancient world, stretching from Greece to northwestern India. He was undefeated in battle and is widely considered one of history's most successful military commanders.

Philip II of Macedon (382–336 BC) was the ruler of the kingdom of Macedon from 359 BC until his assassination in 336 BC. He was a member of the Argead dynasty of Macedonian kings, the third son of King Amyntas III of Macedon, and father of Alexander the Great and Philip III. The rise of Macedon, its conquest and political consolidation of most of Classical Greece during the reign of Philip II was achieved in part by his reformation of the Ancient Macedonian army, establishing the Macedonian phalanx that proved critical in securing victories on the battlefield. His assassination by a royal bodyguard, Pausanias of Orestis, led to the immediate succession of his son Alexander, who then became ruler of Macedon.

More Info: en.wikipedia.org