Non-U.S. citizens in the U.S. military

The United States has citizens of other states in its military. Do most people know this? I'd say probably not. Do other states have similar policies? I'd think probably not, but I am curious.

When I was in the Marines, a good friend of mine was an Irish citizen, and several other friends were Mexican. Thousands of U.S. sailors are Filipino, because of a special agreement between the Phillippines and the U.S. Navy. (Puerto Ricans are also heavily represented in our military, but Puerto Rico is a U.S. territory, so maybe that's different.)

You don't see these facts in the news too often, so I was glad to see the following:

The Washington Post has an article about a Canadian First Nations citizen who was recently killed fighting under the U.S. flag in Iraq. ("First Nations" is the term for the aboriginals or Native Americans of Canada.)

So check it out.