to the greatcoat that was shorter in length, also worn by British officers and Warrant Officers Class I as an optional piece. During the First World War, the design of the trench coat was modified to include epaulettes and D-rings. The shoulder straps were for the attachment of epaulettes or other rank insignia; the D-ring was originally used for attaching map cases, swords, or other equipment to the belt, and there is a popular myth that it was for the attachment of hand grenades. This latter design was dubbed "trench coat" by the soldiers in the front line. Many trench coats had large pockets for maps, and cleverly placed flaps and vents to deal with the odour associated with earlier rubber coats. A range of waterproof coats was designed and sold during wartime that incorporated War Office requirements with traditional aspects of leisurewear. What became known as the "trench coat" combined the features of a military waterproof cape and the regulation greatcoat designed for British officers. Many veterans returning to civilian life kept the coats, which became fashionable for both men and women. Second World War During the Second World War, officers of the United Kingdom continued to use the trench coat on the battlefield in inclement weather. Other nations also developed trench coat style jackets, notably the United States and the Soviet Union, and other armies of continental Europe such as Belgium, France, Germany, Greece, the Netherlands, Poland (and are often seen in war zone photographs in the 1939-40 era, even worn by troops on the attack), although as the war progressed, in the field shorter "field jackets" became more popular, including garments such as the Denison smock used by British commandos, paratroopers, and snipers and the M1941/M1943 field jackets used by the US Army. These garments were shorter and more practical than the trench coat, and as such they allowed the wearer to be more mobile. Later Trench coats have remained fashionable in the decades following the Second World War. Their original role as part of an army officer's uniform lent the trench coat a businesslike respectability, although many prefer to tie the belt in front (rather than use the buckle) to project a more casual look than strict military dress. Humphrey Bogart's Rick Blaine from Casablanca and Peter Sellers' Inspector Clouseau wore the trench coat in the public eye. Often, a fedora or an ushanka (during colder