What does the acronym M*A*S*H stand for?

M*A*S*H stands for Mobile Army Surgical Hospital. The term describes a military medical unit designed to provide surgical care close to the battlefield while remaining mobile.

MASH units were developed after World War II as an improvement over less flexible field-hospital arrangements. During the Korean War, they treated seriously wounded soldiers near the front, reducing the time between injury and surgery. Their work helped advance triage, trauma treatment, blood storage, evacuation, and the use of helicopters as air ambulances.

The M*A*S*H franchise uses the fictional 4077th Mobile Army Surgical Hospital as its setting. Richard Hooker’s 1968 novel, the 1970 film, and the television series all depict doctors and support staff serving with the unit during the Korean War. The fictional hospital was smaller and more dramatically concentrated than most real MASH units.

A frequent mistake is substituting “Medical” or “Military” for “Mobile.” The official phrase is Mobile Army Surgical Hospital, and the acronym is written MASH or stylized M*A*S*H in the entertainment franchise.