SAS an Infantry Regiment Jim Sweeny has made a number of revisions claiming that the SAS is an Infantry Regiment and that 21 22 and 23 are Battalions Below is an extract from Queen s Regulations Queens Regulations for the Army PART 1 PRECEDENCE Precedence of Corps and Regiments 8 001 The following table gives the order of precedence of corps and regiments in the Army Regiments shown collectively therein take precedence amongst themselves as shown in the Army List Order Corps or regiment 1 The Life Guards and The Blues and Royals 2 Royal Horse Artillery a 3 Royal Armoured Corps 4 Royal Regiment of Artillery Royal Horse Artillery excepted 5 Corps of Royal Engineers 6 Royal Corps of Signals 7 Regiments of Foot Guards 8 Regiments of Infantry b c 9 Special Air Service Regiment 10 Army Air Corps 11 Royal Army Chaplains Department 12 The Royal Logistic Corps 13 Royal Army Medical Corps 14 Corps of Royal Electrical and Mechanical Engineers 15 Adjutant General s Corps 16 Royal Army Veterinary Corps 17 Small Arms School Corps 18 Royal Army Dental Corps 19 Intelligence Corps 20 Army Physical Training Corps 21 General Service Corps 22 Queen Alexandra s Royal Army Nursing Corps 23 Corps of Army Music 24 Royal Monmouthshire Royal Engineers Militia 25 The Honourable Artillery Company 26 Territorial Army d 27 The Royal Gibraltar Regiment