At the beginning of World War II, the American Navy was considered one of the most powerful in the world, but during this military conflict it clearly surpassed other navies in the world in terms of the number of ships built (often also in their quality) - primarily the Japanese. At the end of the war in the Pacific, it had, among others, 27 aircraft carriers and 18 battleships. It also had the most powerful naval aviation in the world. It is also worth remembering that at the beginning of the war in the Pacific, the US Navy numbered about 340,000 people, and at the end of it - about 3.4 million people! Each sailor in the US Navy during World War II underwent so-called basic training, which emphasized the physical condition of the soldier, his familiarity with weapons, drill and other basic activities in the army. Only then did sailors undergo specialized training, such as gunners, radar operators, or engine room crews. Most senior officers in the United States Navy graduated from the Annapolis Naval Academy, while many junior officers were trained through the Naval War College's V-12 training program. It is estimated that about 125,000 people attended between 1943 and 1947.