No campaign in World War II was undertaken with as many shortcomings as Operation Watchtower—the invasion of Guadalcanal in the summer of 1942. Rushed into action with little training, virtually no enemy intelligence, and using equipment left over from World War I, the gutsy-but-green men of the 1st Marine Division and its attached units were thrown headlong into what would become one of the bloodiest battles of the war. During almost four trying months of constant shelling, bombing, and ground attacks, the 1st Marine Division defied all the odds and somehow managed to beat the hardened Japanese troops at their own game. No campaign in World War II was conducted with as much ferocity. No campaign saw such sustained violence on land, at sea, and in the air. And no other campaign hung in the balance for so long—to finally be won by the unrelenting courage of a group of American heroes who never gave up the fight.