Many of the M.A.S.H. doctors were in their twenties, many with little advanced surgical training. During battle campaigns, units could see "as many as 1,000 casualties a day". "What characterized the fighting in Korea", one of Hornberger's fellow officers recalled, "was that you would have a period of a week or ten days when nothing much was happening, then there would be a push. When you had a push, there would suddenly be a mass of casualties that would just overwhelm us." There were, another surgeon recalled, "'long periods when not much of anything happened' in an atmosphere of apparent safety—plenty of time to play ... When things were quiet we would sit around and read. Sometimes the nurses would have a little dance." Hornberger's later assessment of his unit's behavior was: "A few flipped their lids, but most just raised hell in a variety of ways and degrees."