Pearl Harbor Naval Base is a significant military installation located on the island of Oahu in Hawaii. It serves as a major base for the United States Navy and is known for its deep-water harbor, which provides safe anchorage for naval vessels. The base plays a crucial role in the defense and strategic operations of the U.S. military in the Pacific region. The base is historically notable for the surprise attack by the Japanese on December 7, 1941, which led to the United States' entry into World War II. Today, Pearl Harbor is home to several memorials, including the USS Arizona Memorial, honoring those who lost their lives during the attack.