In which war did the British army first deploy tanks?

Question

Which of these was a cavalry regiment of the British Army from 1678 until 1971, when they amalgamated with the 3rd Carabiniers (Prince of Wales's Dragoon Guards)?

Answer 1

A first offensive using 49 Mark I tanks took place on 15 September 1916, during the Battle of the Somme, under Field Marshal Sir Douglas Haig, with limited success. Not until 20 November 1917, at Cambrai, did the British Tank Corps get the conditions it needed for success.