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The invention of tanks by the British allowed the long stalemate of the western front to be easily broken, it allowed forces to get over trenches and barbed wire while being protected. Depending on if it was a male or female variant it could also be a mobile heavy gun emplacement.

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The Mark I tank was the first tank to actually see the war. There were male and female versions of the tank with the male tanks having sponsons with each one mounting a 57mm, six-pounder gun. The female tanks, on the other hand, mounted two cumbersome sponsons, designed to carry two Vickers, water-cooled, heavy machine guns instead, with tiny escape doors at the back.

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Designed and put into use by the French in 1917, the Renault FT learned from the flaws of earlier tanks and designed the first "modern" tank, instead of a mounted gun, the tank was equipped with a separate rotating turret. The design also focused more on mobility than sheere power. It is commonly credited as being the first modern tank ever made.

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German forces quickly threw together the A7V tank after discovering what the British had made. towards the end of the war, the first ever tank-on-tank engagement happened

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After WWI many countries saw the use and practicality in tanks, during WWII tanks saw rapid development as technology allowed tanks to serve many purposes. After WWII the modern tank design began and has continued to perfect using the same core foundations as the first tanks.

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While tanks ended up helping to break the stalemate of the war, they were very slow and bulky, they were very cramped, and poor design led to accidents trapping or killing the crew.

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After the war it created many jobs in riveting, metal working, and welding industry to create these tanks, in WWII, thousands of jobs were focused solely on making tanks. Even today we have several factories focused solely on tank production