Contributions
...exactly how many troops have the Solomon Islands and Mongolia sent to Iraq to assist the United States? And, exactly how dollars have Denmark and Eritrea sent to pay the bills?
Well, you can pick the Solomon Islands off the list if you want, ignoring nations like Italy and Australia. If you want more details on contributions, you can check here. Obviously, the U.S. and Britain are picking up the lion's share by any definition, but most nations are offering at least something, including troops.
And let's not forget the courage required for a small nation to go against the United Nations, which has a lot more influence on such nations than it does on ours.