 Between 1870 and 1872, the Milwaukee & St. Paul Railroad (later the Milwaukee Road; since 1985 the Canadian Pacific Railway - CPR) completed a railroad line between Chicago, Illinois and Milwaukee, Wisconsin.In 1880, a branch line was built to Libertyville, Illinois, and the new junction was known as Libertyville Junction.People referred to the community around the junction as Sulfur Glen, due to the high amounts of sulphur in the water nearby.