I've seen several P-51 Mustangs on display at Oshkosh, which had rows of swastikas painted on the sides, typically just underneath the canopy on the left side. I asked the owner of one if his particular warbird had actually fought in WW-II and if those were real kills. He said yes those represented actual Nazi planes destroyed by this P-51. He was unsure if all the German pilots shot down by this plane died or not, and that some undoubtedly must have parachuted and lived, but still that's some rich history there. And it's amazing to think that these planes are still flying today. If I could win the Mega Lotto and afford to buy one of those last remaining Mustangs, I'd have no problems at all flying it, knowing full well that it it had been used to shoot down and kill other pilots.