The War in the Pacific National Historical Park is a multi-unit protected area in the United States territory of Guam, which was established in 1978 in honor of those who participated in the Pacific Theater of World War II. Uniquely among the National Park System, it honors the bravery and sacrifices of all those who participated in the Pacific Theater.

The Battle of Guam was the American recapture of the Japanese-held island of Guam, a U.S. territory in the Mariana Islands captured by the Japanese from the United States in the First Battle of Guam in 1941 during the Pacific campaign of World War II. The battle was a critical component of Operation Forager. The recapture of Guam and the broader Mariana and Palau Islands campaign resulted in the destruction of much of Japan's naval air power and allowed the United States to establish large airbases from which it could bomb the Japanese home islands with its new strategic bomber, the Boeing B-29 Superfortress.