The Whermacht refers to the armed forces, The Heer is the Army, Kreigsmarine the Navy, the Luftwaffe the Air Force and the SS was the Schutzstaffel which was never really a legal branch of service but a tool of the Nazi party. My understanding is that in post war Germany the members of the Waffen or 'Armed' SS did not recieve the benefits of veterans of recognized German armed forces either.