the fledgling Royal Flying Corps that went on to become the Royal Air Force (who continue to use the same type of cap). In 1937, a khaki field service cap, described in an amendment to the Dress Regulations for the Army that year as "similar in shape to the Glengarry" was introduced as the "universal pattern field service cap", and saw extensive service during World War II as a head dress to be worn with Battledress when steel helmets were not required. At around the same time coloured versions were introduced for officers of both regular and territorial regiments, although these were an optional item and were produced in a range of colours for different regiments. In 1940 the War Office announced that such caps were to be part of the uniform of the LDV/Home Guard. Since the universal introduction of the beret in 1947, the field service cap continued as an optional officer's accessory to be worn in barrack and mess dress (as an alternative to the peaked, khaki service-dress cap). They are still tailored in regimental colours. A more obscure type known as the "tent cap" is worn by officers of the Queen's Royal Hussars only and is unique in that it is not fitted with a badge, but identified instead by its regimental colouring. Its origins lie with one of their forebears, the 8th Kings Royal Irish Hussars, who adopted the cap in the Second World War to reflect their long association with the Danish royal family, whose Royal Life Guards wear a similar design of cap with their undress uniform. This cap is in turn based on the French that was worn by hussars in the Napoleonic wars and after. The Torin style of cap is still worn by the Duke of Lancaster's Regiment and the Royal Dragoon Guards. Royal Air Force In the Royal Air Force, a blue-grey field forage cap (sometimes called the 'chip bag hat') of an identical style remains widely worn with both working dress and flying suits. United States In the U.S. Armed Forces it is known as a garrison cap, campaign cap (not to be confused with campaign hat, a distinct form of headgear), flight cap, garrison hat, fore-and-aft cap, envelope cap, or overseas cap. U.S. Army When first issued to U.S. "doughboys" in World War I, the hat was called the overseas cap as it was only worn by