I like what you have done. Knocked out war machinery makes for interesting scenery.
In a Sci-Fi game there was a damaged 'tank'. One player became very interested in whether or not he could get it, or any
part of it, working. To keep him entertained (while the rest got on with the war) I set him several tasks of logic. having passed them
he got the on board computer system working. he was then given several multi-choice options. He chose:-
Armaments (which system do you want to enter?);
Offensive (Attack or defence?);
Most destructive (Level of weapon power?);
Nearest enemy (choose target).
What he had forgotten was it was an ENEMY tank. He blew away three units from his own side.
Many laughs, especially from his enemies.