On June 14, 1944, little more than a week after the D-Day invasion of Normandy, another mighty fleet steamed towards its own D-Day landing. The target of this mighty U.S. armada was the Marianas Island group, which included Saipan, home to an important Japanese base, and Guam, the first American territory captured in the aftermath of Pearl Harbor. When the brutal fighting ended eight weeks later, 60,000 Japanese ground troops and most of the carrier air power of the Japanese Imperial Navy were annihilated.Hell Is Upon Us skillfully describes the entire Marianas campaign-World War II's most ambitious combined service operation and the largest carrier battle in history-and provides riveting first-hand accounts of the soldiers, marines, sailors, and airmen who fought through the hell of Japan's Pacific defense.