Introduction to the Pacific War Historical Park: The Pacific War Historical Park is composed of six different locations. It was opened to the public in 1978 and was built to commemorate the heroic sacrifices of American and Japanese soldiers and Guam residents here. The National Park System provides a large number of replicas from the Second World War, and the park has become a place of remembrance for World War II survivors and those interested in the Second World War. In addition, more than 1,000 acres of water in the park are reserved as part of the memorial park. You can dive to the bottom of the sea and view the military relics that sunk to the bottom of the sea.