What is the french 75 during world war 1?

The French "75" was a howitzer, a large gun used for firing in a high arc onto the enemy. The French 75 was a huge leap in technology of large guns, as it used a hydraulic mechanism to use the recoil of the gun to work the action, and also made the recoil of the gun less. This allowed the French 75 to fire at a much greater rate than contemporary guns.