Identify Two new weapons of war employed during the First World War.

Identify Two new weapons of war employed during the First World War.

1. Use of poison gas
2. Use of aeroplane
3. Use of tanks
4. Use of submarines
5. Use of battleships
6. Identify the main factor that prompted the U.S.A to join the First World War in 1917.
7. Germans declaration of unrestricted submarine warfare/sinking of the US ship.

Virus-free.www.avast.com