It would be the Senate "c. Armed Services Committee" that oversees all branches of the United States’ military, since this is the most efficient way to go about oversight--as opposed to having separate bodies for each branch of the military.
Germany<span>, </span>Italy<span>, </span>China<span>, </span>Turkey<span>, </span>Poland, Switzerland<span>, </span>United Kingdom<span>, </span>United States<span>, and </span>Finland<span>.</span>
They are able to declare war, appoint military officers, sign treaties, make alliances, appoint foreign ambassadors, and manage relations with native americans. Hope this helps!