with plumes, the plumes variously coloured to distinguish them. The Kings Royal Hussars, Queen's Royal Hussars, Light Dragoons, and the Royal Horse Artillery wear a black fur busby, with different coloured plumes and bags (this is the coloured lining of the busby that is pulled out and displayed on the left-hand side of the headdress), as do the Royal Regiment of Artillery and the Royal Signals, despite not being hussar regiments. As the uniforms of Rifles regiments traditionally aped those of the hussars, a somewhat similar lambskin busby is worn by The Rifles and the Royal Gurkha Rifles, with coloured plumes to distinguish them. However, these busbies do not feature bags like in their hussar counterparts. The Royal Lancers; as well as the band of the Royal Yeomanry, feature the czapka, or 'lancer's cap'. The plumes and top of this headgear historically distinguished the various Lancer regiments. The Grenadier Guards, Coldstream Guards, Scots Guards, Irish Guards, Welsh Guards and Royal Scots Dragoon Guards wear bearskins, as do officers of the Royal Regiment of Fusiliers; whose other ranks, however, wear the flat-topped fusilier cap. The Royal Regiment of Scotland wears the feathered bonnet, as do pipers in the Scots Guards and Royal Scots Dragoon Guards. The Princess of Wales' Royal Regiment, Mercian Regiment, Duke of Lancaster's Regiment, Royal Anglian Regiment, Yorkshire Regiment, and Royal Welsh, as Line infantry regiments, wear the dark blue Home Service Helmet with a spike ornament on top, as do the Royal Engineers, Adjutant General's Corps and Corps of Royal Electrical and Mechanical Engineers. The Royal Logistic Corps, Royal Army Medical Corps, Royal Army Veterinary Corps and Royal Army Dental Corps wear the Home Service Helmet, but with a ball ornament on the top rather than a spike. The Royal Gibraltar Regiment wear a white helmet with a spike ornament on the top. The Royal Tank Regiment, Army Air Corps, Parachute Regiment, Special Air Service, Intelligence Corps and the Special Reconnaissance Regiment wear berets; as they do with all orders of dress. The Royal Irish Regiment, as well as the pipers of the Queen's Royal Hussars and the Irish Guards wear the caubeen. Not all full-dress uniforms are scarlet; light cavalry regiments (hussars, light dragoons and lancers) and the Royal Artillery have worn blue since the 18th century, while rifle regiments wear green. The seven support corps and departments in existence in 1914 all wore dark blue