Alexander the Great, arguably the most exciting figure from antiquity, waged war as a Homeric hero and lived as one, conquering native peoples and territories on a superhuman scale. From the time he invaded Asia in 334 to his death in 323, he expanded the Macedonian empire from Greece in the west to Asia Minor, the Levant, Egypt, Central Asia and "India" (Pakistan and Kashmir) in the east. Although many other kings and generals forged empires, Alexander produced one that was without parallel, even if it was short-lived. And yet, Alexander could not have achieved what he did without the accomplishments of his father, Philip II (r. 359-336). It was Philip who truly changed the course of Macedonian history, transforming a weak, disunited, and economically backward kingdom into a military powerhouse. A warrior king par excellence, Philip left Alexander with the greatest army in the Greek world, a centralized monarchy, economic prosperity, and a plan to invade Asia. For the first time, By the Spear offers an exhilarating military narrative of the reigns of these two larger-than-life figures in one volume.