The main cast consists of:
Alan Alda; Hawkeye Pierce
Loretta Swit; Magaret Houlihan
Jamie Farr; Max Kilnger
William Christopher; Father Mulcahy
Harry Morgan; Sherman Potter
Mike Farrell; BJ hunnicut
Gary Burghoff; Radar O'reilly
David Ogden Stiers; Charles Winchester
Larry Linville; Frank Burns
Wayne Rogers; Trapper McIntyre
Mclean Steveson; Henry Blake
Their are many more people in the cast but these are the main people :)
MASH
MASH was not the oldest TV show, nor was it the longest running show. See the link below for a complete list.
September 1972
September 17, 1972
goodbye
The television show was filmed in California.
September 17, 1972
Walter Eugene O'Reilly, "Radar," the Company Clerk in the TV show and movie Mash, was from Ottumwa, Iowa.
1983
If you mean the set for the TV show, it was in California.
11 years
Mobile army surgical hospital