Short answers, pulled from the story.
The 1924 Summer Olympics football tournament was the first official FIFA World Championship to allow professional player participation. Held in Paris, it was also the first major championship to include a South American team, with Uruguay representing that continent.
The four British Associations demanded that FIFA adopt their 1884 definition of a professional player, which covered any payment beyond necessary expenses. The four FIFA representatives on the International Football Association Board refused, and both the United Kingdom and Denmark withdrew their footballers from the Games.
Uruguay qualified by winning the 1923 Sudamericano by maximum points in December of the previous year, defeating Argentina 2-0 in the final game. They were South America's sole representatives at the Paris tournament.
Pedro Petrone of Uruguay finished as the tournament's leading scorer with seven goals. He accepted his gold medal two days before his nineteenth birthday, making him the youngest football gold-medalist in Olympic history.
Uruguay defeated Switzerland 3-0 in the final, with two goals scored in the second half. An estimated 60,000 spectators watched inside the Colombes Stadium, and 10,000 more were locked out.
The Uruguayan team invented the lap of honour, then called the "Olympic turn," after winning the 1924 Olympic title. They ran around the entire athletics field to salute those in attendance, and the ritual has been adopted by champions ever since.