Truman

by David McCullough

Training in the classroom and on the firing range centered on the French 75-millimeter gun, a small, rapid-fire, rifled cannon known for its mobility and phenomenal accuracy. It had been developed twenty years before, its technology guarded by the French as a military secret. The slim, 6-foot barrel was of nickel steel and other alloys that were kept classified. The breechblock, gun carriage, and hydropneumatic recoil system were all of special design. Because the gun recoiled on its carriage, it stayed in place with each shot, and thus no time was lost correcting its aim between shots, which was the secret of its rapid fire. It could get off twenty to thirty shots a minute and had an effective range of five miles. Being light in weight compared to most cannon, a little over a ton and a half, and maneuverable with its high-spoked wooden wheels, it was considered ideal for trench warfare. The fire from a battery of four was murderous. It was called the marvel weapon. The French would later say it won the war for them.