Weird coincidences
Commanding Officers in order: Henry Blake, Frank Burns, and Sherman Potter.
I do NOT count temporary commanding offices who took over while the regular was gone. The three above mentioned were the official CO, including Frank's brief time.
Now the weird part. They died in the exact order they were in command.
McLean Stevenson (1st CO died first, 1996). 4 years later (as in Season 4, CO Frank Burns) Larry Linville died in 2000. 11 years later, Harry Morgan died in 2011...as he was the one who was CO in Season 11.
Perhaps the weird coincidences about MASH was the deaths of Henry Blake actors McLean Stevenson (Show) and Roger Bowen. Both died on the same cause, same month, same year, only a day apart. Stevenson died first on the 15th, followed by Bowen on the 16yh.