Pearl Harbor Site is located on the island of Oahu in Hawaii, which is represented by the 4-letter solution 'OAHU'. The site is located in the city of Honolulu, which is represented by the 8-letter solution 'HONOLULU'. Pearl Harbor is a United States naval base and was the site of a surprise attack by the Japanese on December 7, 1941, which marked the beginning of the United States' involvement in World War II.