What most catches my attention about his fact on gambling within the USA military abroad is how they manage to keep gambling machines in countries like Japan, where gambling and casinos are banned nationwide. It only shows the favourable treatment the government of the United States has in order to keep their soldiers comfortable.
I don't think it is necessarily a bad think, honestly; specially because the money the USA army makes with those slots machines go back to the budget of the military, so it goes to the military personel and their upkeep.

Also, the USA army has other programs to keep their personnel mentally and physically fit for service, it is not all about gambling, they have also ways to access to religious programs, books, among other things.