
This series unveils the engineering secrets of various iconic megastructures that went on to spark a technological revolution, ultimately changing warfare forever. The Nazis built some of the biggest and deadliest pieces of military hardware in history. Adolf Hitler hired men like Wernher von Braun, Ferdinand Porsche and Alfred Krupp to build huge terror machines, high-tech superguns and weapons of mass destruction.

Japanese soldiers construct an island-wide structure on Peleliu in 1944, creating a killing zone that results in the deaths of thousands.

A look at the final months of World War II, as Japan unleashes suicide bombers while turning its islands into a fortress to repel American invaders.

Hitler makes a final attempt to win the war with a surprise winter attack, and the resulting war crimes against American forces.