Upon the assassination of his father King Philip II in the summer of 336 BC, Alexander took over the reins of power of a now united Greece. When he led his combined Macedonian and Greek army into Asia a year later he began the greatest career of military conquest in world history. In 11 short years he overcame the might of the Persian Empire and campaigned across the face of the known world. Fully illustrated, this book covers the development of his army, all his campaigns and battles, and world in which he lived.