The age of Alexander and his conquest of the Persian or 'Achaemenid' Empire, which had existed for over two centuries, represents a watershed in the history of the world.This book offers a fascinating insight into the achievements of one of the greatest generals ever known. Alexander's conquests are of profound significance. By perfecting the new weapons and tactics developed by his father, Philip II, and combining them with the use of specialist units and advancements in siege warfare, Alexander enabled the Macedonian kingdom to move beyond the restrictions of city-state armies and on to the stage of world conquest.