World War II Battlegrounds included the island of Guam and the Italian city of ANZIO. Guam is an unincorporated territory of the United States located in the western Pacific Ocean, while ANZIO is a coastal city located south of Rome, Italy. Both locations were important battlegrounds during World War II, with Guam being the site of a major battle between the United States and Japan in 1944, and ANZIO being the site of a major Allied offensive against German forces in 1944.