The Battle of Saipan in the Mariana Islands, fought between June 15 and July 9, 1944, was among the most bitterly contested of the Asia-Pacific War. With Japanese forces dug into caves and determined to fight to the death, casualties mounted. According to the US Military History, some 24,000 Japanese soldiers were killed and 5,000 committed suicide while 2,949 Americans died and 10,364 were wounded. According to historian John Toland, 22,000 Japanese civilians, as well as an unspecified number of islanders also died, some by compulsory suicides.