It originally saw action as 6th Battalion Tank Corps in 1917 .
The 6th Royal Tank Regiment ( 6 RTR ) was a regiment of the Royal Tank Regiment , of the British Army , until 1959 .
6th Royal Tank Regiment originally saw action as 6th Battalion Tank Corps in 1917 .
The 6th Royal Tank Regiment ( 6 RTR ) was a regiment of the Royal Tank Regiment , of the British Army , until 1959 .