By December 1943 the United States and its allies were well on the way to winning World War II, though nearly two years of hard fighting lay ahead. The US Navy had expanded greatly since the nation's entry into the war two years earlier, fighting the German submarine offensive in the Atlantic while supporting operations throughout the ETO even as it played a more dominant role in the war against Japan.
The following pages reflect the organization of the Navy in both the Atlantic and Pacific at this point in history, based on the War Diaries compiled by each Fleet. The Pacific Fleet page is incomplete due to missing pages in the source material.
Check the changes in the strength and organization of the fleet since October 1941 to see how the Navy was preparing for involvement in the world conflict.