Commanche Run got his first win twelve days later on 28 May at Doncaster Racecourse. Moving up in company, the colt ran third in the 1984 King Edward VII Stakes and the Princess of Wales's Stakes, then won his next two starts at Goodwood Racecourse, taking both the Gordon and the March Stakes. Under jockey Lester Piggott, Commanche Run went on to win three Group One races, capturing the Benson & Hedges Gold Cup, Irish Champion Stakes and the Classic St. Leger Stakes. Retired to stud duty at Coolmore Stud in Ireland, Commanche Run met with limited success. In 1999 he was
Charles the Twelfth at Aintree Racecourse. He was assigned a weight of six stones and six pounds in the Liverpool Tradesmen's Cup, an all-aged handicap race over two miles and started at odds of 5/1 in a field of sixteen runners. Ridden by a lightweight jockey named Francis, Charles the Twelfth disputed the lead with the five-year-old St Bennett before pulling clear in the closing stages to win easily. The "New Sporting Magazine" described the performance as a "true St Leger running". On 17 September Charles the Twelfth was one of fourteen runners (from an original entry of 107) to contest the St