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
Milwaukee County, Wisconsin WI Combined Statistical Area (See Milwaukee metropolitan area). There are 19 cities in Milwaukee County. The largest being Milwaukee, West Allis, Wauwatosa, Oak Creek, and Greenfield in that order. Milwaukee County is the most densely populated county, that ranks in the top 50 most populated, when excluding Cook County,Philadelphia, and New York Burroughs from the list. The county is home to two pro sports teams, and the world's largest music festival. Portions of what is now Milwaukee County are known to have been inhabited by a number of Native American tribes, including the Sauk, Meskwaki or "Fox", Menomonee, Ojibwe and