Ran into a situation last night--my own fault for being too slow--where the allies had a few AT guns protected by machine gunners and infantry. There wasn't much hope I'd get a tank through and I couldn't flank because of buildings and natural choke points. Obviously have to take the AT guns out but to do that you have to take the MGs and infantry out. What do you do when a tank or infantry assault would be futile? It seems like the only thing I could have done was some kind of artillery barrage or firestorm.
Any tips on how to break down a defensive line like this?