Tony Robinson's World War I: The Air Force HD

By 1918 we had around 4000 elite combat planes. Not only were the planes better, so to were the men flying them. Crucially with American, Canadian, French and Australian pilots taking to the skies we were outnumbering the enemy. Subscribe to Discovery TV for more great clips: http://www.youtube.com/subscription_center?add_user=DiscoveryTV Follow Discovery on Twitter: http://www.twitter.com/DiscoveryUK