What weapons came out during World War 1?

World War I saw the introduction of several new weapons that transformed warfare, including machine guns, which provided devastating firepower on the battlefield. Artillery advancements, such as heavy howitzers and long-range guns, enabled more effective bombardments. Chemical weapons, like chlorine and mustard gas, were also used for the first time, causing significant casualties and psychological effects. Additionally, tanks were introduced as a means to break through trench lines and overcome the stalemate of trench warfare.