Regimental Sergeant Major - United Kingdom

United Kingdom

In the British Army, the RSM is addressed as "Sir" or "Ma'am" by his or her subordinates. In the Household Cavalry, the appointment is Regimental Corporal Major (RCM).

In the Royal Marines, Regimental Sergeant Major was an actual rank (and equivalent to Warrant Officer Class I in the Army) until the Royal Marines themselves re-adopted the ranks of Warrant Officer Classes I and II in 1973 (although the term continued to be used interchangeably for Warrant Officers Class I until at least 1981).