Northumberland role in the Industrial Revolution from the 18th century on. Many coal mines operated in Northumberland until the widespread closures in the 1970s and 1980s. Collieries operated at Ashington, Bedlington, Blyth, Choppington, Netherton, Ellington and Pegswood. The region's coalfields fuelled industrial expansion in other areas of Britain, and the need to transport the coal from the collieries to the Tyne led to the development of the first railways. Shipbuilding and armaments manufacture were other important industries before the deindustrialisation of the 1980s. Northumberland remains largely rural, and is the least-densely populated county in England. In recent years the county has
Csanád County county (a small area south of Békéscsaba) to form the new county of Csanád-Arad-Torontál. After World War II, Csanád-Arad-Torontál county was divided between the Hungarian counties of Békés and Csongrád. The Romanian part of former Csanád county is now part of the Romanian county of Arad. Csanád county was one of the most densely populated counties of the Hungarian Kingdom.The Hungarians formed an ethnic majority in every district except for the district Nagylak. The main part of the Slovaks and Romanians lived in the district Nagylak, the Serbs in the district Battonya. In 1900, the county had a population of