10 Weapons and Vehicles in WWI
Chemical warfare first appeared by the Germans when they used poison gas during a surprise attack in 1915, in Flanders, Belgium. It was first released from large cylinders, and carried by the wind into enemy lines. Later, phosgene and other gases were loaded into artillery shells and fired into enemy trenches. The Germans used chemical warfare the most, until realizing that the enemy soldiers wearing gas mask didn't fight as good. All sides used the gas frequently by 1918, and it's use was a frightening development that caused serious suffering, or even death.
42cm Type M-Gerat 14 L/12 (Big Bertha)
The muzzle velocity is 1,300 ft per second. Required a crew of dozens of men, and took at least 6 hours to assemble, and disassemble the weapon.