Posse.

About Posse

Posse was an American-bred, British-trained Thoroughbred racehorse and sire. He ran only six times, winning twice, in a racing career which lasted from October 1979 until July 1980. As a three-year-old he was promoted to second after a controversial race for the 2000 Guineas and established himself as one of the leading milers in Europe with wins in the St James's Palace Stakes and Sussex Stakes. He was retired to stud at the end of the year and had some success as a sire of winners.