a peak was added to produce the design of cap worn in regimental colours with undress and in khaki with Service Dress at the start of the First World War. When the Austrian style side cap was revived in 1937 as the Universal Pattern Field Service Cap (used by the British Army in the Second World War), the Dress Regulations for the Army, described it as "similar in shape to the Glengarry". Modern wear The Glengarry continued to be worn in dark blue by all regiments of the Scottish Division up to their final amalgamation into the Royal Regiment of Scotland in 2006. In parade dress, it was worn by all regiments except the Black Watch, who wore the blue balmoral bonnet, and musicians of some regiments, who wore feather bonnets in full dress. The Black Watch, however, wore a plain blue Glengarry in some orders of dress with trews. The Cameronians (Scottish Rifles) wore a plain rifle green Glengarry up until their disbandment in 1968. The blue Glengarry currently worn by the Royal Regiment of Scotland has red, green and white dicing, a red toorie, black silk cockade and the regimental cap badge surmounted by a blackcock (Tetrao tetrix) feather. This last is a tradition taken from the Royal Scots and King's Own Scottish Borderers. Other Commonwealth military forces that have Scottish and Highland regiments also make use of the Glengarry. Irish Army The headdress worn by Irish Army's Cavalry Corps is called a Glengarry but is more similar to the caubeen in appearance, than to the Scottish headdress of the same name. It was designed in 1934 for the Cavalry Corps as a more practical headdress than the standard peaked cap in the confines of their armoured cars and tanks. The Glengarry is the same colour as the army's service dress uniform with a black band and two black swallow-tail ribbons at the rear. The cap badge is worn over the left eye. Officers in the RDF wear a similar Glengarry but with green band and ribbons as part of their service dress uniform. Army pipers and drummers wear a black Glengarry with a saffron band and ribbons and a dark green feather hackle. Civilian wear The Glengarry is worn by male members of staff at the Palace of Holyroodhouse, the King's Official residence in Scotland. The Glengarry is also commonly worn by civilians, notably civilian pipe bands,