US Army Helmet M1917 with 3rd Army decal

US Army 3rd Army Set WW1 - Military Classic Memorabilia Activated on November 7, 1918, in Chaumont, France, the U.S. Third Army (Army of Occupation) was established just days before the WWI armistice to occupy Germany. Commanded by Major General Joseph T. Dickman, the 250,000-strong force enforced surrender terms in the Rhineland, headquartered in Koblenz from December 1918 until deactivating in July 1919