The 75mm cannon first appeared at Picatinny during the World War I era where it was emplaced on the East side of Picatinny Lake and used for Lot Acceptance Tests. The M1897 was the most advanced ...
In WWII, the 75mm tank gun became the gold standard for destroying enemy armor. But between the German KwK 40, the American M3, and the British QF 75mm, each country developed a different approach.