The Battle of Guam was a US operation to recapture the island of Guam from the Japanese in 1943, during the Second World War. Guam is at the southern end of the Marianas group, about 1,600 km north of New Guinea. It was occupied by the Japanese on the 10th of December 1941 and used as a naval and air base. US forces invaded on the 21st of July 1943 and by the 10th of August the entire island was in their hands. US losses amounted to 1,744 killed and 5,970 wounded; the Japanese lost 18,250 killed and 1,250 captured. Some of the Japanese garrison fled to the interior of the island - the last of them did not surrender until 1960. Research Battle of Guam