The dip, frighteningly enoughD
), was brought to us by the VP community in WWII. ......
Ah, yea-as ... love them VP traditions. Current garrison cap, NIB example, depicted w/no dimple.

A.K.A. "overseas caps" or "piss cutters" in the Navy -- the same ones that became popular with US troops on overseas deployments, post-SpanAm and WW1. Sadly, they originated --- with the French --- and when the traditional "combination cover" took up too much space and was considered too hot in many tropical/sub-tropical climes ... the garrison cap was born in U.S. service.

And the "dimple" or "dip" supposedly originated in the VP Patron community ... in the 1930's when enclosed cockpits came about and the very uncomfortable headsets, known as "C-clamps" were worn instead of leather or fabric flying helmets. The garrison cap/piss cutter provided some padding relief and cushioning from a C-clamp on a long mission --- and now all S.H. Naval Aviators sport the "look" -- complete with "dimple" -- usually in the rear, however some misguided souls have theirs in the front.
I would suppose that's why many Marines (well, who knows with USMC ...


(Side note: when we have to wear "C-clamps" these days in the 747 ... we usually acquire our "padding" from the upper-deck head (lavatory) in the "ammenities" drawer -- usually provided by the Tampax company. Don't knock it if you haven't tried it -- it works .... no Tampax company in 1930's Naval Aviation, though .... ) :captain_1