Thanks for the tip that they're wearing green hats now. Those blue ones would have made for great sight picture and sight alignment!
By the way, great screen name!
Semper Fi!
I think the green beanies are NATO and the blue are U.N.
Who knows what colours they are implementing of the rainbow from one day to the next.
What is the fine line between NATO troops and the United Nations troops and the United States troops is a good question.