The British Army is listed according to an order of precedence for the purposes of parading. This is the order in which the various corps of the army parade, from right to left, with the unit at the extreme right being highest. Under ordinary circumstances, the Household Cavalry parades at the extreme right of the line. Militia and Army Reserve units take precedence after Regular units with the exception of The Honourable Artillery Company and The Royal Monmouthshire Royal Engineers. Order of precedence In the British Army's Order of Precedence, the Household Cavalry is always listed first and parades at the extreme right of the line. However, when the Royal Horse Artillery is on parade with its guns it takes precedence. Household Cavalry Royal Horse Artillery Royal Armoured Corps Royal Regiment of Artillery Corps of Royal Engineers Royal Corps of Signals Infantry Foot Guards Line Infantry Rifles Special Air Service Army Air Corps Special Reconnaissance Regiment Royal Army Chaplains' Department Royal Logistic Corps Royal Army Medical Corps Royal Electrical and Mechanical Engineers Adjutant General's Corps Royal Army Veterinary Corps Small Arms School Corps Royal Army Dental Corps Intelligence Corps Royal Army Physical Training Corps General Service Corps Queen Alexandra's Royal Army Nursing Corps Royal Corps of Army Music Royal Monmouthshire Royal Engineers (Militia) (Army Reserve) Honourable Artillery Company (Although Army Reserve Regiments, they are included in the order of arms Regular Army) Remainder of the Army Reserve Royal Gibraltar Regiment Royal Bermuda Regiment Household Cavalry, Royal Armoured Corps and Infantry orders of precedence Cavalry, Tank and infantry regiments of the British Army are listed in their own orders of precedence, which dates back to when regiments had numbers rather than names. The order comes from the start of the regiment's service under the Crown, up to 1881 and the "Cardwell Reforms", when the use of numbers was abolished in favour of linking with and using county names. The regiments of the Household Division are always listed first, as they are the most senior, followed by the line regiments. In today's army, which has many regiments formed through amalgamations of other regiments, the rank in the order of precedence is that of the more senior of the amalgamated units. It is for this reason that the Princess of Wales's Royal Regiment, one of the youngest in the army, is ranked second in the line infantry order – it is the direct