Athletics at the 1924 Summer Olympics – Men's 400 metres

This was the seventh appearance of the event, which is one of 12 athletics events to have been held at every Summer Olympics. The defending gold medalist from 1920, Bevil Rudd of South Africa, did not return; the other two medalists, silver-winning Guy Butler of Great Britain and bronze-winning Nils Engdahl of Sweden, did. Eric Liddell of Great Britain was the 1924 Scottish and AAA champion. Argentina, Australia, Brazil, Bulgaria, Haiti, Ireland, Mexico, Poland, and Switzerland appeared in the event for the first time. The United States made its seventh appearance in the event, the only nation to compete in it at every Olympic Games to that point. ==Competition format==

The competition retained the basic four-round format from 1920. The first round had 17 heats, ranging from 1 to 5 athletes. The top two runners in each heat advanced to the quarterfinals. There were 6 quarterfinals, intended to have 5 or 6 runners in each but sometimes having 4 due to withdrawals; the top two athletes in each quarterfinal heat advanced to the semifinals. The semifinals featured 2 heats of 6 runners each. The top three runners in each semifinal heat advanced, making a six-man final. ==Records==

These were the standing world and Olympic records (in seconds) prior to the 1924 Summer Olympics. (*) 440 yards (= 402.34 m) In the quarterfinals, Josef Imbach set a new Olympic record with 48.0 seconds. In the semifinals Horatio Fitch improved the Olympic record with 47.8 seconds. In the final, Eric Liddell set a new world record with 47.6 seconds; this time was ratified as a 400 metres world record as Ted Meredith ran his record over 440 yards. World Athletics rescinded Liddell's time as a world record in 1928. ==Schedule==

Round 1 All heats were held on Thursday, July 10, 1924, and started at 2 p.m. The best two finishers of every heat qualified for the quarter-finals. Heat 1 Heat 2 Heat 3 Heat 4 Heat 5 Heat 6 Heat 7 Heat 8 Heat 9 Heat 10 Heat 11 Heat 12 Heat 13 Heat 14 Heat 15 Heat 16 Heat 17 Quarterfinals All quarter-finals were held on Thursday, July 10, 1924, and started at 4 p.m. The best two finishers of every heat qualified for the semifinals. Lajos Kurunczy and Erik Åström had qualified for the quarterfinals but withdrew. Quarterfinal 1 Quarterfinal 2 Quarterfinal 3 Quarterfinal 4 Quarterfinal 5 Quarterfinal 6 Semifinals All semi-finals were held on Friday, July 11, 1924, and started at 2:45 p.m. The best three finishers of each heat qualified for the final. Semifinal 1 Semifinal 2 Final The final was held on Friday, July 11, 1924, and started at 5:30 p.m. Taylor's ankle gave out just before the finish line in a career-ending injury; he crawled across the line. Imbach tripped over the lane-dividing ropes, fell, and was unable to finish. ==References==