Thoughts on Bunkers

[Saddlesore]

After having played various scenarios with bunkers as defender and attacker, I have a thought on bunkers.  This may be completely unrealistic or impossible from a programing end, but what if after X number of assaults or Y number of artillery and aerial bombardment a bunker is reduced to rubble similar to a village or town?  Just a thought, shoot any holes you like in this. 

Steve