Operation Mo happened in 1942.
MO is method of operation.
MO is an acronym for 'method of operation' or, alternatively, 'motivation'. A high MO basically refers to having a high motivational level.
Stetson/Levine hats are in St. Louis MO
Operation Askari happened in 1983.
Operation Python happened in 1971.
Operation Nicety happened in 1942.
Operation Albion happened in 1917.
Operation Colombo happened in 1975.
Operation Batman happened in 1942.
Operation Protea happened in 1981.
Operation Harling happened in 1942.
Operation Concert happened in 1943.