USA HISTORY

All of the following were weapons new to warfare during WWI, except?

(A) Poison Gas

(B) U-boats

(C) Machine Gun

(D) ** Atomic Bomb

Concept note-1: -Military technology of the time included important innovations in machine guns, grenades, and artillery, along with essentially new weapons such as submarines, poison gas, warplanes and tanks.

Concept note-2: -World War I popularized the use of the machine gun-capable of bringing down row after row of soldiers from a distance on the battlefield. This weapon, along with barbed wire and mines, made movement across open land both difficult and dangerous. Thus trench warfare was born.