The
wars of Alexander the Great were fought by King
Alexander III of Macedon ("The Great"), first against the
Achaemenid Persian Empire under
Darius III, and then against local chieftains and warlords as far east as
Punjab,
India. Alexander the Great was one of the most successful military commanders of all time. He was undefeated in battle. By the time of his death, he had conquered most of the world known to the
ancient Greeks. Although being successful as a military commander, he failed to provide any stable alternative to the
Achaemenid Empire—his untimely death threw the vast territories he conquered into
civil war.