My father and uncles used to hunt gazelle in North Africa using leftover M1's and US Army jeeps, I knew a Frenchman whose playtime as a kid included restoring and firing machine guns left over from WWII in Normandy.
Germany and Eastern Europe are littered with Wehrmacht ammo dumps that were just covered with earth at the end of WWII. Every year, the German police bust individuals who have restored WWII weaponry they dug up-- one guy in Berlin a couple summers ago was trying to sell a 40mm Bofors AA gun in working condition with ammo.
Europe has very strict gun control laws, but I swear half the families have leftover ordnance from the World Wars stashed somewhere.
Reading the Army’s official history of my Father’s WWII battalion, they once dug 18 mines out of a six by six foot plot of ground.
The Germans must have stacked them on top of each other.