From flamethrowers to Zeppelins: 5 WWI weapons that changed modern warfare forever

World War I accelerated weapons innovation with flamethrowers, poison gas, the Paris Gun, Zeppelins, and U-boats.

These weapons had major battlefield and psychological effects, terrorizing soldiers and civilians alike.

Germany’s attacks, including the Second Battle of Ypres and raids on London, pushed new defenses and tactics.

The war helped define modern chemical, aerial, and submarine warfare, reshaping combat in the 20th century.