Ironhorse was a rock ban from Vancouver, British Columbia, formed by the former The Guess Who and Bachman-Turner Overdrive member, Randy Bachman along with Tom Sparks(vocals, guitars), Chris Leighton(drums) and Ron Foos(bass). They had a minor U.S. hit single in April 1979 with "Sweet Lui-Louise", which peaked at #36 on the Billboard Hot 100 chart. In Canada, the song peaked slightly higher at #26. Ironhorse released two albums on the Scotti Brothers label: 1979's Ironhorse and 1980's Everything is Grey. The second release had Frank Ludwig(ex-Trooper) replacing Sparks. Ron Foos left to rejoin Paul Revere and the Raiders. In 1980 Ironhorse evolved into Union with the addition of Bachman's former BTO bandmate Fred Turner. Union put out one album On Strike on the CBS subsidiary Portrait Records.