British troops riding on the back of the Mark IV tank as it crawls over a trench ledge in 1918
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World War One: How tanks helped win final victory

19 June 2014 Last updated at 12:39 BST

Tanks were introduced into the battlefield in 1916.

Their development was a response to the stalemate that trench warfare created on the Western Front.

BBC Radio Wales programme Good Morning Wales has been looking at how roles crucial to Army operations now were developed during World War One.

Serving soldier L/CPl Thomas Warner from 1st The Queen's Dragoon Guards has been finding out more, as part of a series of reports by Charlotte Dubenskij.