I wonder if the training was any easier back then.
I can relay a story my dad told me about boot camp.
They crawled through mud a foot deep with barbed wire 2 feet above their heads. Pig guts were tossed all around and hanging from the wire to simulate the intestines of less fortunate Marines blown up by mortor fire.
He said they fired live 30-06 machine guns 30 inches above their heads and swept the gun back and forth and if you stood up you could be shot.
Now days, I guess all you have to do is call a “Time Out” and it all stops.