Guam is an island in the western Pacific Ocean and is an organized, unincorporated territory of the United States. It is one of five U.S. territories with an established civilian government. The island's capital is Hagåtña (formerly Agana). Guam is the largest and southernmost of the Mariana Islands..

During the occupation, the people of Guam suffered terrible atrocities including torture, beheadings, and rape, and were forced to adopt the Japanese culture. The Japanese occupation also imposed a new name, Ō-miya Jima or Great Shrine Island, on the island. Guam was subject to fierce fighting when US troops recaptured the island on July 21, 1944, a date commemorated every year as Liberation Day.
Today, Guam's economy is supported by its principal industry, tourism, which is primarily composed of visitors from Japan. Guam's second-largest source of income is the United States military.