WWI: The First Modern War

Tanks were the first armored fighting machines to be used on the battlefield. These "land ships" were designed in secrecy to break through heavily fortified trenches and offer troops protection from artillery.

While most people think the Blitz originated in WWII, the first Blitz actually occurred during WWI, when bombs were delivered from giant airships designed by Count Ferdinand von Zeppelin.

The weaponization of the chemical chlorine by the Germans flew in the face of international treaties and unleashed an escalation of poison gas weapons on both sides of WWI.

The Atlantic became a killing field as German submarines took on the might of the dominant British Navy. These stealthy, silent killers were able to sink 5,200 ships by war's end, nearly bringing Britain to its knees.