Alexander III of Macedon known as Alexander the 
Great was an Ancient Greek king of Macedon. 
Alexander was one of the most successful military 
commanders of all time and it is presumed that he was 
undefeated in battle. By the time of his death at the age 
32 he had conquered the Achaemenid Persian Empire 
adding it to Macedon's European territories; according 
to some modern writers this was much of the world 
then known to the ancient Greeks.