I believe currently that the US Military will accept any person meeting minimum mental and physical standards who elects to join the service involved, regardless of his citizenry. Back when the US was drafting individuals, all young men over the age of 18 years residing in the US were required to register for the draft and were eligible to be drafted. As a result, I had a Uruaguayan young man of German descent, the son of the Uruguayan ambasador in Washington, as a member of my basic training platoon as well as several Hungarians, all of whom had enlisted in the Army. At that time, under the Lodge Act, foreign nationals who enlisted in the US Forces for a period of 3-4 years were eligible for US citizenship following their enlistment, rather than having to wait the usual seven years. From a recent article in Time, I suspect a similar program is still in effect today. Many of these Lodge Act foreign nationals later became members of special operations forces, aided in no small part by their ability to speak another language fluently, and a deeply felt desire to overcome Communism.

A similar program was in effect for the French Foreign Legion, which took foreign nationals from many countries including former Nazi Germans after WWII. These folks, like anyone in the Foreign Legion, were never stationed inside France, but in French possessions and fought in conflicts in foreign locales like Algeria and Viet Nam. With the loss of Algeria, and other economic reversals France's standing armies shrank greatly and the French Foreign Legion was finally brought back to mainland France.

In many other times US servicement and women had to suck it in to accomplish Washington's economic desires. For many years, in order to curtail the flow of US money into Europe, service wives were forbidden travel to where their spouses were stationed, while there were no limitations on US tourists who could travel freely, and one year we in the service were not only denied wage increases voted by Congress, but were told that due to a failure of the US Budget being passed by Congress, we might not even be paid the wages we had earned for the month for which there was no budget.

Dave