The franchise, originally the Quesnel Millionaires, started out in the Peace Cariboo Junior Hockey League (PCJHL) in 1975. The Millionaires are the 1977, 1978, 1979, and 1987 PCJHL Champions. They also won the 1977, 1978, and 1979 Cyclone Taylor Cup Championships. In 1996, the Millionaires moved to the British Columbia Hockey League (BCHL).
On May 9, 2011, the BCHL approved the sale of the Millionaires to the Chiefs Development Group in Chilliwack. The former Chiefs franchise was renamed the Langley Rivermen in preparation for the Millionaires' move to Chilliwack to become the Chiefs.
On May 20, 2018, the Chiefs won their first RBC Cup, 4–2 over the Wellington Dukes while hosting the tournament.
Season-by-season record
Note: GP = Games Played, W = Wins, L = Losses, T = Ties, OTL = Overtime Losses, GF = Goals for, GA = Goals against, Pts = Points
Western Canada Championships: BCHL – AJHL – SJHL – MJHL – Host Round-robin play with 1st vs. 2nd - winner advance to National Championship & loser to runner-up game 3rd vs. 4th in 2nd semifinal winner to runner-up game loser eliminated. Runner-up game determines 2nd representative to National Championship. WCC competition began after the 2013 season.