Yes. I did. You must have established permanent residence, and have declared an intent to obtain US citizenship first.
That depends of the context of the question. If he was a member of the US army and served with Canadians, he would wear an American uniform. If he was an American and he joined the Canadian military, he would wear a Canadian uniform.
Billy Dave III an African American
Yes. As Commander In Chief of the US Armed Forces, otherwise known as the Union Army, Abraham Lincoln joined the American Civil War against the Confederate Army.
Kelsey
American revolution .
1829-1861 for the US Army and the Confederate Army 1861-1865, sorry but i dont have the awnsers to when he joined the US military academy.
Zachary Taylor was 24 when he joined the army.
Many, many thousands of people joined the Union army.
Private Benjamin (1980) "You see, I did join the Army, but I joined a different Army. I joined the one with the condos and the private rooms."
The US Army, the oldest of the US Armed Services, was formed in 1775 during the American Revolution
Not even every US citizen living outside the US has to join the US army. Certainly people from other American countries do not have to.
Robert E. Lee joined the Military after he graduated from West Point in 1828.