The Humber Pig was a heavily-armoured truck used by the British Army from the 1950s until the 1990s. The Pig was also used by the Royal Ulster Constabulary (RUC) for a short period during the late 1960s and early 1970s. The RUC painted their Pigs Admiralty Grey, rather than NATO Green. It became particularly well-known from its presence in film clips of the streets of Northern Ireland during the worst of the "Troubles".