Weapons used in WW1 By Qwertyuiop2804 Period: Jan 1, 1914 to Apr 30, 1916 WW1 Jan 30, 1914 Rifle Mar 28, 1914 Machine Guns Aug 20, 1914 Poison Gas Jan 1, 1915 Artillery Feb 1, 1915 Tank Nov 12, 1915 Flamethrower May 16, 1916 Planes