difficulty attacking as Soviets in Moscow 42

[ComradeP]

Maybe not assaulting is the reason for some of the difficulties: as long as you assault with about 3:1 odds in men, you can get a close to 1:1 or usually at worst 1:2 casualty ratio provided you don't get hammered by artillery. 20% defensive bonus is by far not enough to stop overwhelming odds. It's an entirely different world from the 90% for the Normandy campaign someone mentioned.

Also: Katyusha's are real killers when targeting units in clear terrain.