They didn't, at least not on a large scale as Mexico wasn't invaded nor saw any conflict within its borders during WW2.
Most casualties were crews of marine merchant ships attacked by U-Boats on the Atlantic, as well as pilots who were part of the 201 Air Squadron sent to help the US on the Pacific Theater. In total, there were 100 civilian deaths as well as 7 military casualties for Mexico during the war.
Mexicans
Mexicans
New war-related job opportunities. YOUR WELCOME
No battles fought here
Mexicans love tacos and the taco storage was depleted after WWI
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mexicans
They didn't.
America
the first world war dictatorships the Great Depression
There were many things like starvation diesese and all the normal things that war people suffer
Temporarily allied during World War II, the US and the USSR became competitors and the cold war resulted. World War II also through many nations into untold economic depressions.