On September 15, 1944, General William Rupertus and the 16,000 Marines of the U.S. 1st Marine Division moved confidently toward Peleliu, an obscure speck of coral island 500 miles east of the Philippines. Though he knew a tough fight awaited him, Rupertus anticipated a quick two-day crush to victory, strengthening Gen. Douglas MacArthur's flank in his drive on the Philippines. Instead, as "The Devil's Anvil" reveals, American forces struggled desperately for more than two months against 10,000 deeply entrenched Japanese soldiers who had spent six months preparing for the battle. By the...

On May 12, 1945, the 6th Marine Division was nearing Naha, capital of Okinawa. To the division's front lay a low, loaf-shaped hill. It looked no different from other hills seized with relative ease over the past few days. But this hill, soon to be dubbed, Sugar Loaf, was very different indeed. Part of a complex of three hills, Sugar Loaf formed the western anchor of General Mitsuru Ushijima's Shuri Line, which stretched from coast to coast across the island. Sugar Loaf was critical to the defense of that line, preventing U.S. forces from turning the Japanese flank. Over the next week, the...