Zepplins and U-boats.
V2 rocket
In World War 2 the Germans introduced the V2 rocket, a terrifying new offensive weapon. In WW1 poison gas was considered the most terrifying weapon.
Poison gas was the terrifying weapon of World War 1. The V1 Flying Bomb and V2 Rocket were the terrifying weapons of WW2.
Zyklon B
Ships
The British tank was superior and in much greater numbers than the Germans. They helped to terrorize the Germans in the lattter stages of the war. The Germans, totally underestimated the potency of this new weapon.
The Thundergun.
The zeppelin and the blitzkrieg.
The U-boat submarine
The Potato Gun
Isis Unveiled was created in 1877.
Nature Unveiled was created in 1984.