In 1897, a French artillery development team composed of General De Vere, Colonel De Boer and Captain Rimayio invented the 75mm field gun, which was the world's first modern cannon. The 75mm field gun was developed based on the patent of the German Hausenne and used the long recoil principle. However, Germany refused to adopt the long recoil gun.
This field gun has great power. In a battle, the French artillery used this kind of artillery to bombard the German army, causing the German army to abandon their helmets and armor, suffer heavy casualties, and return in defeat. This gun was also mounted on a special mount and became one of the earliest anti-aircraft guns. It can even be mounted on commercial ships and patrol boats. When the French were developing the 75mm field gun, they successfully evaded the reconnaissance and theft activities of the German secret intelligence agency. They ostensibly conducted multiple tests of the short-recoil gun to cover up the secret tests of the long-recoil gun. The enemy leads people astray. As a result, the Germans spent a lot of effort to imitate the French field gun, but it was a fake gun. This made the German artillery equipment lag behind for many years. Until 1914, it could not catch up with the level of French artillery equipment. The 75mm artillery is the first field gun to completely solve the recoil problem. The gun body can slide on the cradle through the guide wheel. The cradle is mounted on the gun mount, and the gun mount is connected to the piston rod in the reentry barrel. When the gun recedes, the piston compresses the hydraulic oil, causing part of the hydraulic oil to enter the air chamber through a narrow oil valve to compress the air. When the gun sits to the end, it returns to its original position under the reaction of the compressed air. This is the main secret of the excellent performance of the 75mm field gun.