That's a great idea on the down-pilot.
I had also got to thinking about left-over wreakage,
like in a spawn point where panzers might get hit,disabled,blownup left to burn so when next tank comes along,it'll see that there had been a tank battle here before.
Or plane parts all over the hill side from that bomber formation that crashed on it's way to a mission or enemy bombers,bullet-riddled,just outside your base that quite didn't make it in.
Debris wouldn't have to stay there forever,it could all be cleared just as a base/town gets rebuilt. what do you think HT? Give it a go down the line?