I believe getting in range and issuing a stop order. From there, any unit will auto-attack. Sounds as though there's a strange situation where issuing an attack order on a garrison will target the structure they're in, instead of the squad itself.
well, an attack order on a building will always target the building but some weapons at least (small arms) will attack occupants instead.
it's really strong and it hard counters the brit emplacements but i'm not really bothered by it as it's limited to 2 (3?) doctrines and the brits have other options.
no but i've never experienced it at all, despite always having sound on high. used to have inbuilt realtek and now have an ASUS Xonar essence STX on third party drivers.
probably but i don't think it would have went anywhere. the western soviet union was pretty badly trashed by the fighting and the US was in full steam ahead mode. i don't think they had the industrial base or people to sustain the fighting for very long.