The men's 400 metres hurdles event was part of the track and field athletics programme at the 1924 Summer Olympics. The competition was held on Sunday, July 6, 1924, and on Monday, July 7, 1924. Twenty-three hurdlers from 13 nations competed. The maximum number of athletes per nation was 4. The event was won by Morgan Taylor of the United States, the fifth consecutive victory by an American in the event. Erik Wilén received silver (following the disqualification of Charles Brookins), Finland's first medal in the men's 400 metres hurdles. Another American, Ivan Riley, took bronze. Background This was the fifth time the event was held. It had been introduced along with the men's 200 metres hurdles in 1900, with the 200 being dropped after 1904 and the 400 being held through 1908 before being left off the 1912 programme. However, when the Olympics returned in 1920 after World War I, the men's 400 metres hurdles was back and would continue to be contested at every Games thereafter. One of the six finalists from the 1920 Games returned: fourth-place finisher Géo André of France. The event, a very unusual one before 1920, was becoming more common; the AAU had added it to its programme. Morgan Taylor was the AAU champion and U.S. trials winner. Argentina, Chile, Denmark, Greece, and Italy each made their debut in the event. The United States made its fifth appearance, the only nation to have competed at every edition of the event to that point. Competition format The competition featured the three-round format introduced in 1908: quarterfinals, semifinals, and a final. Ten sets of hurdles were set on the course. The hurdles were 3 feet (91.5 centimetres) tall and were placed 35 metres apart beginning 45 metres from the starting line, resulting in a 40 metres home stretch after the last hurdle. There were 6 quarterfinal heats, with between 3 and 5 athletes each. The top 2 men in each quarterfinal advanced to the semifinals. The 12 semifinalists were divided into 2 semifinals of 6 athletes each, with the top 3 in each semifinal advancing to the 6-man final. As with all other races the track was 500 metres in circumference. Records These were the standing world and Olympic records (in seconds) prior to the 1924 Summer Olympics. Morgan Taylor won the U.S. trials in a time of 52.6 but he also knocked over a hurdle,