The ‘backbone’ of any infantry platoon is the senior Non Commissioned Officer... The Sergeant in this case. This NCO is shouting commands over the din of battle and is armed with the sturdy MK.Ⅱ Sten Gun. If kept clean and well-maintained The Sten could be an excellent, close-quarter battle weapon capable of devastating fire. Its 9mm round was also the most commonly used pistol round by European militaries.