WW2 began forthe United States when Jap bombers and midget subs cowardly attacked the Pacific Fleet at Pearl Harbor. - in the middle of peace negotiations Several large ships were sunk and many were damaged. But the navy quickly grew in strength. At the end of the war - 24 battleships, 35 aircraft carriers, 77 escort carriers, 92 cruisers, 501 desroyers, 406 destroyer escorts, and 262 submarines were in service. This was the greatest Navy that ever sailed the seas.. (worldbook) Ya think??