The Indian Ocean remained principally a British wartime theatre

Did the United States Navy conduct much work in or from the Indian Ocean during the Second World War?

Some American ships and submarines operated there, but the United States generally worked through the British because the Indian Ocean was primarily a British naval area.

American vessels did appear in the Indian Ocean, including submarines and ships supporting particular operations. The theatre's wider command and sustainment structure, however, was principally British. The Pacific War should not be viewed only as forces moving westward from the United States. British naval power was also moving eastward through the Indian Ocean, creating another axis of pressure on Japan.