Many early WWI tanks had their turrets mounted on the side of the vehicle, much like da Vinci's original design, although this approach was gradually dropped in favor of the layout we today ...

Ever wondered what it was like inside a WW1 trench, tank, or WWII’s legendary Lancaster Bomber? These stunning cross-sections reveal the secrets, design, and reality of life and war inside ...

War forces innovation and while WW1 ended 100 years ago ... Instead guns were side-mounted and were either cannons or machine guns. Tanks in WW2 got a big upgrade called the Boiling Vessel.

The tank was designed to withstand machine-gun fire ... and if you wanted to see out the side, you looked through steel periscopes, which gave you a sort of translucent outside light, all distorted.

Although armored warfare was still in its infancy, the British Mark IV was one of the more iconic WW1 tanks that were developed ... guns that were mounted on side extensions called sponsons.

WW1 tank commander Cecil Sewell was awarded the Victoria Cross for his bravery in trying to help stranded colleagues at Fremincourt in France in August 1918. Georgie took a ride in a replica Mark ...