The Oath of Enlistment for all military personnel includes the phrase "To support and defend the Constitution of the United States against all enemies, foreign and domestic, to bear true faith and allegiance to the same..."
So the primary allegiance is to the Constitution. However, the Constitution also appoints the President of the United States to be the Commander In Chief of all American military forces.
I would say that it is because they probably had no other choice because back then a lot of other different kind of races would judge them and do bad things to them and also jews are really smart, they can adapt to pretty much anything if they really wanted to.
Answer:
April 12, 1861 – April 9, 1865
Explanation: