Regimental Sergeant Major (RSM) is an appointment held by Warrant Officers Class 1 in the British Army and Royal Marines. The RSM is the senior warrant officer in a regiment or battalion, and is primarily responsible for maintaining standards and discipline. In the Household Cavalry he is the Regimental Corporal Major (RCM).
The RSM is never addressed as "Sergeant Major". He is addressed as "Mr (surname)" by officers, and as "Sir" or "Mr (surname), Sir" by his inferiors. Only his commanding officer (the lieutenant colonel commanding his battalion or regiment) has the privilege of addressing him as "RSM".
This rank is held by the Regimental Sergeant Major of the Army (RSM-A).
WO2s holding Sergeant Major or CorporalMajor appointments are often referred to as the "Sergeant Major" or the "CorporalMajor", but WO1s are only ever referred to using their full appointment or its abbreviation (the "RSM" or the "Garrison Sergeant Major", for instance).
WO2s are commonly addressed as "Sergeant Major", "CorporalMajor" or "Q" (for Quartermaster Sergeants) as appropriate (or as "sir" or "ma'am").
New recruits were finally received by the 116th in the spring of 1864, and six new companies: E, F and G from Philadelphia, H, I, and K from Pittsburgh and surrounding area, brought the regiment up to full strength for the first time.
Though the majority of its men were now new recruits, the regiment fought with its characteristic steadiness and gallantry throughout the Spring Campaign of 1864.
There were major immigration periods in the 1830s, 1840s, and 1850s; the numbers steadily increased until, according to the 1860 census, well over one and a half million Americans claimed to have been born in Ireland.