Fred the Red Shirt wrote:

As you know, he did not volunteer for deployment in Vietnam.
When he enlisted in the ANG he indicated that he did not want
to be stationsed overseas.

You do know that these "dream sheets" were divided into two
parts: stateside and overseas, right? Any entry in the overseas
portion was considered volunteering for worldwide duty. If you
chose (for example) the UK and nothing else - your second (empty)
choice exactly matched the first opening in S.E. Asia, Korea,
Iceland, or Alaska (don't ask why its considered "overseas"...).

The smart guys filled in all the blocks with countries to which
they couldn't be assigned... they had volunteered, but not been
selected for any location in the world.