Alexander III the Great, the King of Macedonia and conqueror of the Persian Empire is considered one of the greatest military geniuses of all time. He was inspiration for later conquerors such as Hannibal the Carthaginian, the Romans Pompey and Caesar, and Napoleon.  Alexander was born in 356 BC in Pella, the ancient capital of Macedonia. He was the son of Philip II, King of Macedonia, and Olympias, the princess of neighboring Epirus.

Alexander spent his childhood watching his father transforming Macedonia into a great military power, winning victory after victory on the battlefields throughout the Balkans.   At age 12 he showed his equestrian skill to his father and all who were watching when he tamed Bucephalus, an unruly stallion horse, unable to be ridden and devouring the flesh of all who had tried. Plutarch writes:

Philip and his friends looked on at first in silence and anxiety for the result, till seeing him turn at the end of his career, and come back rejoicing and triumphing for what he had performed, they all burst out into an acclamation of applause; and his father shedding tears, it is said, for joy, kissed him as he came down from his horse, and in his transport said, 'O my son, look thee out a kingdom equal to and worthy of thyself, for Macedonia is too little for thee' (Alex. 6.8.).

Alexander would ride Bucephalus in all of his major battles, together till the very end. When he was 13, Philip hired the Greek philosopher Aristotle to be Alexander’s personal tutor.  During the next three years Aristotle gave Alexander a training in rhetoric and literature and stimulated his interest in science, medicine, and philosophy, all of which became of importance in Alexander’s later life. 

In 340, when Philip assembled a large Macedonian army and invaded Thrace, he left his 16 years old son with the power to rule Macedonia in his absence as regent, which shows that even at such a young age Alexander was recognized as quite capable.  But as the Macedonian army advanced deep into Thrace, the Thracian tribe of Maedi bordering north-eastern Macedonia rebelled and posed a danger to the country.  Alexander assembled an army, led it against the rebels, and with swift action defeated the Maedi, captured their stronghold, and renamed it after himself to Alexandropolis.  Two years later in 338 BC, Philip gave his son a commanding post among the senior generals as the Macedonian army invaded Greece. At the Battle of Chaeronea the Greeks were defeated and Alexander displayed his bravery by destroying the elite Greek force, the Theban Secret Band. Some ancient historians recorded that the Macedonians won the battle thanks to his 

bravery.