Why were tanks unsuccessful war machines win WW1

"They were also highly unreliable mechanically and prone to breaking down. The interior of each tanks was also a hot, noisy, and often fume filled environment for the crew. "

because they used to many at once.

Explanation:

the british organized a bombardment against gremany but they used a large amount of them at once, while the gremans were in their dug-outs. so therefore the ysed a huge amount of tanks on the germansto find that they were gone.

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