Association football, also known as simply football, is an international team sport usually played between two teams of eleven players. It is by far the most popular game in the world, with over 250 million players in over 200 countries and dependencies. It can be performed at any stage of life, from youth to adults, and is extremely popular not only in Europe but also in Asia and America. Furthermore, it began in Germany but is now played in several countries. Many followers believe that the game could be traced back to ancient Rome and Greece.

The game is played with two halves, with each half using a different formation and different positions. This allows the game to change on a dime when the score isn't going the players' way. The objective is a try by any team to get the ball to the end zone, which is located at the center of the playing area. Most American football teams begin the game by throwing the ball in the air and then jumping forward to catch and return the ball to the goal line; this is called conducting “are” in the United States.

The running back is also responsible for catching the ball, which can be known as “captured” or “snagging”. The offensive player then runs down the field trying to touch the finish zone (the opposite side of the goal line) with the ball, while the defense tries to stop that team from getting to the end zone.

The professional football leagues in the USA, Canada, and Mexico each have their own rules. In the American football league, the offense and defense must be used simultaneously, meaning two people can't rush to the ball at the same time. This rule makes the game more exciting to watch and at times it can be really intense. It can also be frustrating because if one team does not run out the clock, another team has an equal chance to win.

The association was created to make professional football in the United States more competitive. The association also consists of a commissioner, whose duties are to manage and maintain the integrity of the NFL draft and combine players to form the best professional football teams.

Another interesting part of the game is that during the special plays the officers will indicate the field goal or overtime situation. The “arm over arm” play, for instance, is a special call in the American football. When this play is initiated by the offensive team, the defense must pay the ball carrier to the outside of the field and the offensive team must return the ball to the side. There are two fouls in this drama, which are a tackle without the ball and pass interference. If the offensive team cannot return the ball to the side of the field, or it receives an unsportsmanlike conduct penalty before returning the ball, the result is a turnover and a penalty for the crime.