Ajax was a champion Australian bred Thoroughbred racehorse and sire, who won 18 consecutive races before he was defeated at the odds of 40/1 on, causing a huge racing sensation. He had wins from 5 furlongs (1,000 m) to 1+1⁄2 miles (2,400 m), equalled the Australasian record for one mile (1,600 m), and created three new race records. At stud in Australia, Ajax proved to be a good sire. He was then sold as a 14-year-old horse and exported to the United States before he was later sold to Bing Crosby and Lin Howard. Ajax was inducted into the Australian Racing Hall of Fame in 2004.

The Australian Racing Hall of Fame is part of the Australian Racing Museum which documents and honours the horseracing legends of Australia. The museum officially opened in 1981 and created the Hall of Fame in 2000.