In 1902, America found itself fighting a war in the Philippines - a dirty, vicious guerrilla affair rife with assassinations and ambushes. To its astonishment, the United States was forced to commit 120,000 men - two-thirds of its armed forces - to calm the country. Here, in this essay by New York Times bestselling author Thomas Fleming, is the dramatic story of what became known as General John J. Pershing's war.