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Mobile Army Surgical Hospitals were conceptualized in 1946 as revolutionized units of ASG Units which were “Auxiliary Surgical Hospitals” made during World War II became obsolete. MASH units had 60 beds, surgical, nursing, other enlisted and officer staff available at all times. Often working long hours to save lives in many wars, MASH Units were in operation from the Korean War all the way to the Gulf War and the remnants slowly disappeared in the early 2000s. MASH units filled a very vital role in military medicine, that was providing close support to army units upwards of 10,000 to 20,000 soldiers. There is also a low mortality rate as a whole coming from these units as the transportation time to hospitals was low resulting in fewer patients dying within the “Golden Hour”. The “Golden Hour” is the first hour after an injury to a person which is referred to in drama as the most important hour. This is because mobility and mortality have the highest chances of being kept for a patient, that is one of the reasons why MASH units were located so close to the front lines. The term was made famous in the novel, movie, and television series M*A*S*H, which depicted a fictional MASH unit. The U.S. Army deactivated the last MASH unit on February 16, 2006. The successor to the Mobile Army Surgical Hospital is the Combat Support Hospital.