On his only appearance as a two-year-old, Brief Truce was one of eighteen juveniles to contest a maiden race over six furlongs at Fairyhouse on 9 November. He started the 7/4 favourite and won by two and a half lengths from the John Oxx-trained Polar Wind.
1992: three-year-old season
Brief Truce began his second season in the Leopardstown 2,000 Guineas Trial Stakes on 18 April in which he finished second, beaten a neck by the Vincent O'Brien-trained Portico. Three weeks later he started favourite for the Listed Amethyst Stakes over the same course and distance and won by four lengths from the filly Tijara. On 16 May at the Curragh Brief Truce started at odds of 11/1 in a six-runners field for the Irish 2000 Guineas. He finished third behind the English 2000 Guineas winner Rodrigo de Triano and Ezzoud, beaten two and a half lengths by the winner. The colt was then stepped up in distance for the Gallinule Stakes over ten furlongs at the Curragh on 6 June and won by length from the Tommy Stack-trained Firing Line. Ten days after his win at the Curragh, Brief Truce was sent to England for the 147th running of the St James's Palace Stakes at Royal Ascot and started a 25/1 outsider in an eight-runner field. Rodrigo de Triano and Ezzoud where among the leading contenders as well as the Diomed Stakes winner Zaahi, but the favourite for the race was Arazi, the outstanding two-year-old of 1991. The other runners were the Gimcrack Stakes winner River Falls, Casteddu and the 100/1 outsider Beldi. Kinane positioned the colt, who was equipped with blinkersfor the first time, in fourth place behind Zaahi in the early stages before switching left to make his challenge in the straight. He caught the leader in the final strides and won by a short head with Ezzoud in third. Rodrigo de Triano, who had made a threatening run down the centre of the track, finished fourth ahead of Arazi. On 6 September, Brief Truce was matched against older horses for the first time when he was sent to France for the Prix du Moulin at Longchamp Racecourse. Starting the 2.1/1 favourite he finished strongly but failed by a neck to overhaul the filly All At Sea with Hatoof two and a half lengths back in third. Three weeks later at Ascot, the colt started the 7/1 fourth choice in the betting for the Queen Elizabeth II Stakes behind Selkirk, All At Sea and Marling. After being restrained in the early stages he made steady progress in the straight and finished second in rough race, two lengths behind the four-year-old Lahib. On his final appearance Brief Truce was sent to Florida to contest the Breeders' Cup Mile at Gulfstream Park on 31 October despite previous reports that he would be aimed at the Breeders' Cup Classic. He finished third of the fourteen runners, beaten three lengths and a neck by Lure and Paradise Creek.
Stud record
Brief Truce was retired from racing to become a breeding stallion. He stood in Ireland and Switzerland and was shuttled to Australia for the southern hemisphere breeding season. He had his greatest success in Australia where his best winners included Diatribe, Red Oog, True Jewels, General Truce and True Glo. In 2012, at the age of 23, he was reported to be still covering mares at Independent Stallions in Victoria, which was also the home of his former rival Arazi. By September 2017 Brief Truce had been retired from stud duty and was enjoying retirement at Stockwell Stud. He died at Stockwell Stud in August 2018 at the age of 29; stud owner Mike Becker said "He was a great horse to work with and he taught a lot of young fellas who are now working at studs around the world what it is like to handle a stallion because if you didn't learn quick, he was going to teach you quick...He has gone well, and he has had a great life."