Football is a team sport that has many rules that must be adhered to. Each team consists of players of different positions on the field. Each team has its own offense and defense. The offense tries to score touchdowns, while the defense tries to prevent them from scoring. If a team fails to score a touchdown, the game is called a turnover.
Football became a popular sport after the Victorian era. It became part of the Olympics in 1908. The London Games were the first to feature the game, and it has been played in every Summer Games since. The popularity of the sport has increased steadily over the past century. FIFA, the international governing body of the sport, has also grown and strengthened its position as a global authority for competition. In 1961, Guinea became the 100th member of FIFA, and by the end of the century, more than 200 nations were members of FIFA.
The rules of football are continuously being changed. The most important change came in 1925 when the offside rule was changed. Before this change, an attacking player in the opposition’s half was considered to be offside if there were three opposing players between him and the goal. With this change, the number of intervening players was lowered to two, which encouraged more goals. However, this change also triggered the development of new defensive tactics and rules.