You can forget about an US-dominant land force in Poland. the United States has 182,060 troops stationed in Iraq (150,400 active component and 31,660 National Guard or Reserves), 26,000 troops in Afghanistan, 20,000 troops in Korea (plus another 9,000 airforce and navy personnel), plus thousands scattered throughout Japan, Europe, etc. There is simply nothing left to send to Poland. Thus, you might get a US CBG or two, and some US Airforce assistance, but it will be NATO troops fro,m Germany, Britain, Italy, Benulux and maybe France and Norway that will come to Poland's aid. The other members of NATO, such as Greece and especially Turkey will likely bow out in sending troops to Poland.