2. Artillery: Artillery was another major weapon of World War 1. Artillery pieces could fire large shells over long distances, and could destroy enemy positions and fortifications. Artillery was also used to support infantry attacks, and to bombard enemy supply lines.
3. Poison gas: Poison gas was a horrific weapon that was used in World War 1. Poison gas could cause severe burns and respiratory problems, and could be fatal if inhaled. Poison gas was used by both sides in the war, and caused thousands of casualties.