The Pacific Island of Guam was settled by the second quarter of the 2nd millennium BCE by an Indonesian-Filipino people. Spain officially claimed the island in 1565 but did not attempt to conquer it until the latter part of the 17th century. During the Spanish-American War, the U.S. warship Charleston steamed into Apra Harbor and bombarded the old fort. Guam was ceded to the United States. During World War II the Japanese landed on Guam just after the Battle of Pearl Harbor. Allied forces retook Guam by August 10, 1944.