How did Beetle even get through basic training? With as lazy as he is, he should have washed out of the Army long ago.
It was actually touched upon in the strip itself, back in the early years when Beetle first entered the Army. This was during the Korean war, and a lot of young men were drafted (though ironically, Beetle wasn't; he signed up voluntarily to prove to his draftee friends he wasn't a coward). Naturally he didn't do well on any of the tests, but was accepted into the Army anyway because, as the authority decreed, everybody had to put up with "second-rate produce" in those days.