ww II eficionados?

First of all, Good for you! More of these stories need to be preserved. Was your father in the U.S. army? It might mean something different for different armies. I believe in the US it meant Munitions Officer (officer in charge of acquiring, storing and distributing the ship's compliment of ammunition, from small arms to main guns, rocket and depth charges, torpedoes and the like). Hope this helps!

Excellent. History needs to be preserved and yours is an excellent question.

I don't know what side your Dad was on, because M and O meant different things on different sides.

My Uncle Gordon's destroyer was destroyed by a U-Boat and only 13 made it onto a lifeboat (265 is the usual complement on one of these vessels). He was on watch-duty that night. He was Glaswegian. A Canadian Corvette found them after this lengthy time, and, Uncie G, was the only one who retained all his toes because of his watch-boots.

He became a very big alcoholic

MOMunitions Operations

Sorry bud I am a history buff, and I did some research regarding this question but I couldn't find anything. Hopefully someone knows.

It would probably stand for "Munitions operations". It would have to do with moving bombs, mortars, ammo ect. from place to place using vehicles with special tactics and schedules.

More information needed. please give some context in how MO was being used in regard to the Munitions. was it an abreviation on the casing itself. or what?