Heh heh!
Another fun wartime idea would be a Kelly's Heroes-style scenario, with a rogue unit going out on a treasure hunting/profiteering operation. Most of my grandpa's World War 2 stories were about stuff like that. Stealing crates full of wine bottles in France, commandeering a crop dusting biplane in Italy and cruising it around until the Air Corps threatened to shoot them down, etc. You could also have larger-scale hijinks like Milo Minderbinder's trading operations in Catch-22.
