in 13 short years he amassed the largest empire in the entire ancient world — an empire that covered 3,000 miles. And he did this without the benefit of modern technology and weaponry. In his day, troop movements were primarily on foot, and communications were face to face.

In 338 B.C.E., King Philip of Macedon invaded and conquered the Greek city-states. Philip took advantage of the fact that the Greek city-states were divided by years of squabbling and infighting. Philip succeeded in doing what years of fighting between city-states had not done. He united Greece.