After Operation Torch secured French West Africa an air route was set up flying planes US-Brazil-West Africa-UK. The Brittany Peninsula extends west quite a ways. Airplanes, especially Fighters, could easily go off course and fly over Brittany. The Germans set up a fake RAF airfield there and had a number of US aircraft land there and were captured with many serving the Germans in Squadron 200.
The Italians had a captured P-38, used still in US markings, that would link up with straggling bombers. The pilot would tell the bomber they could dump their guns and ammo to lighten the load and then shoot them down. Word got back to N. Africa about what was happening. They sent a YB-40 Gunship along on a Raid and it straggled on purpose. The P-38 showed up and they dumped some ammo, but not all of it. When the P-38 attacked from close in it was shot down.