The 671st Bombardment Squadron is a former United States Army Air Forces unit, assigned to the 416th Bombardment Group. The squadron was activated a medium bomber unit during World War II. It trained in the United States before deploying to the European Theater of Operations, where it served with Ninth Air Force. It moved to the continent of Europe following D-Day and continued operations until the end of the war, earning a Distinguished Unit Citation for its actions in combat. It returned to the United States in the fall of 1945 and was inactivated at the port of embarkation.