Answer:
Jamie Farr (Jameel Joseph Farah) and Alan Alda (Alphonso Joseph D'Abruzzo) have served the U.S. Army in Korea in the 1950s after the Korean War.
The series is itself based on a team of doctors and support staff stationed at the 4077th Mobile Army Surgical Hospital in Uijeongbu, South Korea, during the Korean War. Jamie Farr is sometimes shown wearing dog tags which are his original dog tags when he was in the army.
Jamie Farr plays the role of Maxwell Q. Klinger who wears different dresses in an attempt to convince the army that he is crazy and deserves a Section 8 discharge. Alan Alda has the name Hawkeye Pierce.
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