Less often than you see somebody running with a katana...
Katanas were actually pretty common. Not being used by the Allied forces or in the European part of the war, but still.
That is because Katana is cultural identity to Japanese, but not really usefull in trench war.
duduspace11 "Well, since we are estimating costs, Pokemon Red/Blue did cost Nintendo about $50m to make back in 1996"
Mr Puggsly: "Hehe, I said good profit. You said big profit. Frankly, not losing money is what I meant by good. Don't get hung up on semantics"