Complex sentence: The design was originally intended solely for the Canadian market as an alternative to the unpopular RTS but ultimately the Classic, produced from 1982 to 1997, won instant success in both Canada and the United States.
Split into simpler sentences: The design was originally intended to be restricted to the Canadian market only as an alternative to the RTS, which proved unpopular in Canada. However the Classic, produced from 1982 to 1997, won instant success in both Canada and the United States.