Who was Alexander and what age did he become king of macadonia?

Alexander the great was a king of Macedonia and one of history's most renowned military leaders. He ascended to the throne at the age of 20 after the assassination of his father, King Philip II, in 336 BC. Alexander is famous for creating one of the largest empires of the ancient world, stretching from Greece to Egypt and into northwest India. His conquests spread Greek culture and influence throughout these regions.