Over 200 were quickly killed by a Maxim gun. The German Rifle Commission began firing tests of the Maxim gun at Zorndorf in 1889. The British armed them with a 3-pounder in the fore and a Maxim gun aft. Chauvel distinguished himself fighting alongside a group of New Zealanders and capturing a Maxim gun. The cooling jacket is similar to the Maxim gun but comes with a steam valve. World War I and is an adaptation of Hiram S. Maxim's original 1884 Maxim gun. Two witnesses also claim that Cantelo referred to his invention as "my maxim gun". The Singapore Volunteer Corps received a Maxim gun in 1889. He sold the Maxim gun to the British government. The Vickers, like the Maxim gun from which it was developed, uses a short-recoil action. But as a psychological weapon, the Maxim gun was truly phenomenal. The Maxim gun has been used in a vast number of conflicts. Hiram Maxim invents the Maxim gun, the first single-barreled machine gun. After shooting a few hundred rounds, the Maxim gun became erratic before stopping altogether.