Historian Dan Snow explains to Michael Douglas how the near stalemate of trench warfare in WW1 was relieved by the introduction of tanks, aircraft and shells. We see how protection was provided and a path was cleared for foot soldiers as the tanks rolled forward through barbed wire and most other obstacles.

This clip is from:
World War One Centenary

Could be used to inform discussion on the impact tanks and aircraft had on the outcome of the war. Students may also find this helpful in researching how war provided the right climate for rapid development in both aircraft, weaponry and machinery.