Who used the new weapons in world war 1?

In World War I, new weapons were used by multiple nations involved in the conflict, notably by the Allies and Central Powers. Key innovations included machine guns, tanks, and poison gas, which were employed by countries like Germany, Britain, and France. These weapons transformed traditional warfare tactics, leading to unprecedented levels of destruction and loss of life on the battlefield. The introduction of such technology marked a significant shift in military strategy and the nature of combat.