The shift in steel production locations in the United States from the mid-nineteenth century until the mid-twentieth century can best be described as * starting in the Pittsburgh area and then migrating towards the Midwest before ending up on the East and West coats, as well as the Chicago area starting in the Pittsburgh area and then migrating towards the East and West coasts before moving to the South and Southeast starting on the East and West coasts then migrating towards the Midwest before ending up in the Pittsburgh area starting on the East and West coasts and then migrating towards Pittsburgh before ending up in the Midwest starting in the Midwest and then migrating towards Pittsburgh before ending up on the East and West coasts