Other interesting things you won't see in CM:
Bullets and shells hitting the ground at a shallow angle, bouncing off.
Enemies surrendering by coming out with their hands over their heads (instead of you having to go to where they are..)
Deformable terrain - tanks compressing trenches as they go over them, and even smaller shells taking bites out of earth mounds around dug in positions.
Houses and trees -and sometimes soldiers - catching fire.
Captured enemy weapons. Russian SMGs in German hands, and German panzers sometimes (but rarely) being used by the Russians.
Bullets and shells hitting the ground at a shallow angle, bouncing off.
Enemies surrendering by coming out with their hands over their heads (instead of you having to go to where they are..)
Deformable terrain - tanks compressing trenches as they go over them, and even smaller shells taking bites out of earth mounds around dug in positions.
Houses and trees -and sometimes soldiers - catching fire.
Captured enemy weapons. Russian SMGs in German hands, and German panzers sometimes (but rarely) being used by the Russians.