When during WWII did the US Armed Forces switch form the "Doughboy" helmet to the "Steel Pot?"
Frompictures I have seen, i woud gather the time frame to be between June'42 and August '42 but when was the fielding date?
My father went on active service (from ROTC) in june 1941. He told us the flat helmets were being replaced in the training schools then (Army Air Forces), & when he joined his squadron in January or Febuary 1942 the squadron equipment included round helmets. My guess is the distribution was not accomplished is a single event.
My divsion was shipped out in April of '42, a few days before we went aboad they took our old helmets and issued the new style, the liners were made of some kind of material that didn't last very long, then we got the new type liner, i don't remember the date but the original liners were crap.