The railroad arrived in the 1860s. The three railroads that would reach Green Bay were the Chicago & North Western (C&NW), SOO Line, (SOO), and the Milwaukee Road (MILW). These railroads were highways which allowed people and products to travel all over the state, increasing business and trade opportunities. The area was able to grow and enrich itself with the use of the river and the plentiful timber resources. This led to the paper industry becoming the major employer in Green Bay, and opened up the port for international trade.