Wisconsin became aU.S. territoryfollowing the American Revolution and soon after began attracting settlers looking for work inits mining, lumber and dairy industries. It was admitted to the union as the 30th state in 1848.In the years leading up to the Civil War,Wisconsin was an important stop on the Underground Railroad, with manyslaves passing through the state on their way to freedom in Canada. Today, Wisconsin leads the nation in dairy production and is known for the quality of its cheddar cheese–residents even sometimesrefer to themselves as “cheeseheads.” Famous Wisconsinites include architect Frank Lloyd Wright, magician Harry Houdini andU.S. Army General Douglas MacArthur.