Alexander the Great is considered one of the greatest military geniuses in history. Starting in Macedonia, he formed an army and began conquering Greece, Syria, Egypt, Persia, and went all the way to India. However, his conquests were not without horrific and barbaric practices. This included crucifying thousands, burning cities to the ground, and slaughtering thousands of innocent people. He also was a paranoid ruler who had many people put to death for fear they might overthrow him. The Macedonian Empire died with him and was divided up into three seperate countries.