Before America entered World War II, twenty-two U.S. citizens went to England and volunteered with the Royal Navy. Commissioned between September 1939 and November 1941, they fought in the Battle of the Atlantic and on a variety of fronts. While the history of Americans serving in the Royal Air Force is well known, the story of these naval volunteers has not been previously told. Most trained at the Royal Naval College in Greenwich, but since foreign military service was against U.S. law, their names were never made public. Now, after years of research, their identities and the details of their contributions can be made known.