Let's say in the initial push into Iraq during OIF 1, a certain special forces pushed from the north. I believe 6 trucks, maybe 20 guys max, neutralized over a battalion size element of Iraqi Armor (consider that 20+ tanks/APC's). Utilizing close air support, Javelin, and TOW2B anti tank weapons. Not bad for a bunch of cowboys
I think if we were to go toe to toe with mother Russia, we'd basically do what we've done since the Gulf War. Dominate in the air, then push hard and fast on the ground.