Not that long ago, I was looking through some archival photos (Kodak collection?) of WWII. One was of a Cadillac factory, that was converted to tank production. Start of conversion to rolling tanks out, in some crazy short period; something like 40 days.
In recent years, a D-Day commemorative film was being made. A D-Day veteran was flown to France, to perform as a consultant on the film. Once on-location, he became worked up about the actors they chose, saying they shouldn't be using "children". The actors showed him their real-life personal IDs..... the veteran said it was only on
that day it really sunk in, how young they all were, back when.
D-Day: 1 things you might not know about the Normandy invasion - BBC News
Rgds, D.