The 36th Infantry Division ("Arrowhead"), also known as the "Panther Division", "Lone Star Division", "The Texas Army", or the "T-patchers", is an infantry division of the United States Army and part of the Texas Army National Guard. It was organized during World War I from units of the Texas and Oklahoma National Guard. It was reactivated for service for World War II 25 November 1940, was sent to the European Theater of Operations in April 1943, and returned to the Texas Army National Guard in December 1945.