Clamin that mortars and esp. Atg are solid counter pto bunkers is insane. Mortar would take an hour to kill bunker. first shot would automaticalyc reveal its location. And that mortar would be wiped wit barrages in a matter of seconds.
Axis more often get mortars than anyone. So mortars vs mortars and bunkers is in their favor always. Bunkers in tye corners are esp. hard to deal with and really bad for the game. Since require no user input. Mortar that retreat from the corner would get back hour after bunker get repair.
