The Battle of Guam was a significant military engagement during World War II, taking place from July 21 to August 10, 1944. It involved the United States forces landing on the island of Guam to reclaim it from Japanese occupation, which had begun in 1941. The battle was part of the larger campaign to retake the Mariana Islands and was crucial for establishing air bases in the Pacific. The U.S. forces, primarily the 3rd Marine Division and the 77th Infantry Division, faced fierce resistance from the Japanese defenders. Despite the challenging terrain and strong fortifications, the Americans successfully captured the island, marking a pivotal victory in the Pacific theater.