Literal question
18a. Is this person a veteran of active-duty military service in the Armed Forces of the United States?
If service was in National Guard or Reserves only, see instruction guide.
[] Yes
[] No -- Skip to 19
[Mark yes if this person was ever on active duty in the U.S. Army, Navy, Air Force, Marine Corps, or Coast Guard, even if the time served was short. For persons in the National Guard or military reserve units, mark yes only if the person was ever called to active duty; mark No if the only service was active duty for training.]