From Pirosh's original ideation of
Combat!, authenticity was considered important to the show. Most of the cast members were veterans of the armed services, with several having served during World War II. Dick Peabody and Shecky Greene served in the
U.S. Navy, while Rick Jason served in the
Army Air Corps. Vic Morrow served in the Navy in 1947. Pierre Jalbert served in the
Royal Canadian Air Cadets during World War II, Jack Hogan served as a staff sergeant in the
U.S. Air Force during the
Korean War, and Conlan Carter served in the
U.S. Air Force during the post–
Korean War era. Steven Rogers served six months in the U.S. Army. "We did everything from crawling under barbed wire with live .50 calibre machine bullets whizzing over our heads, to swinging across a muddy pond on a rope, to pulling the pin on a live grenade and throwing it properly, to running an obstacle course," Jason later wrote. "It was much more than I’d had to do in [World War II] for my real basic training in the Air Corps." Morrow noted that the instructors who worked with the cast at Fort Ord had one common request: not to act like
John Wayne. "Poor John," Morrow told a reporter. "I wonder if he knows he's almost a dirty word in the Army." Seligman also asked the Army to assign a technical advisor to review and offer critique of scripts—specifically, someone who had been present at D-Day and subsequent campaigns. The Army complied, assigning Maj. Homer Jones. He served with the
82nd Airborne's
508th Parachute Infantry, parachuted into northern France on D-Day and participated in four campaigns. Jones had access to, and conferred with, Seligman, producer Robert Blees and the show's various directors and technicians to ensure the show was staged accurately. He would also arrange for the show to borrow Army equipment that could not be furnished by the studio's props department. == Syndication ==