Mines
 

It would be nice if there was an option for multi-player, to set mines as 'realistic'; so that friendly mines will kill all including your own side.

The sapper would make an invisible enemy mine visible with red flag, then infantry can defuse it if they choose; and friendly mines also have red flags, but are visible from the outset by friendlies.

Also, can we have mines detonate when shelled, like we had in SHOWW2.