User: I really like flying and am thinking about joining the U.S. military.  If I want to be a pilot, which part of the military should I join?
Assistant: If you join the military and want to be a pilot, you can join any branch of the military, but you will have different options in each branch.  The Air Force primarily trains jet pilots and a smaller number of helicopter pilots.  The Navy also trains mostly jet pilots and a fewer number of helicopter pilots.  The Marine Corps is part of the Navy but has separate aviation units that are nearly half helicopters and half jet pilots.  The Army trains mostly helicopter pilots and a handful of jet pilots for specialized missions and executive transport.  So, you have options in each branch of the military, but it depends on what type of pilot you want to be.