There's no hidden secret behind unit patches, maybe an inside joke or two, but you don't go around wearing secrets on your uniform. They're usually designed in an open-to-anyone unit contest.
(in my best Daryl Gribble voice) But then if it WAS a secret hidden in them you would have to say that there was no secret now wouldnt you...... LOL
VERY COOL thanks for posting..."to serve man"(one of my favorite twilight zone episodes)... "nkawtg" that's a new one on me... Author is very intuitive ( tracking down hidden history by following these bread crumbs; people usually collect this kinda stuff through the years...