Arsenal Football Club is a professional football club based in Islington, London, England, that plays in the Premier League, the top flight of English football. The most successful London club, they have won 13 League titles (including one unbeaten league title), a record 13 FA Cups, two League Cups, 15 FA Community Shields, the League Centenary Trophy, one UEFA Cup Winners' Cup and one Inter-Cities Fairs Cup. Arsenal was the first club from the South of England to join The Football League, in 1893, and they reached the First Division in 1904. Relegated only once, in 1913, they continue the longest streak in the top division, and have won the second-most top-flight matches in English football history. In the 1930s, Arsenal won five League Championships and two FA Cups, and another FA Cup and two Championships after the war. In 1970–71, they won their first League and FA Cup Double. Between 1989 and 2005, they won five League titles and five FA Cups, including two more Doubles. They completed the 20th century with the highest average league position. Herbert Chapman, who changed the fortunes of Arsenal forever won the club the first silverware and his legacy led the club to dominate the 1930s decade but died prematurely of pneumonia in 1934. He helped introduce the WM formation, floodlights, and shirt numbers, he also added the white sleeves and brighter red to the club's jersey. Arsène Wenger was the longest-serving manager and won the most trophies. He won a record seven FA Cups, and his title-winning team set an English record for the longest top-flight unbeaten league run at 49 games between 2003 and 2004, and in 2003-04 going an entire season unbeaten for the first time in modern history, receiving the nickname The Invincibles. In 1886, Woolwich munitions workers founded the club as Dial Square. In 1913, the club crossed the city to Arsenal Stadium in Highbury, becoming close neighbours of Tottenham Hotspur, and creating the North London derby. In 2006, they moved to the nearby Emirates Stadium. In terms of revenue, Arsenal is the ninth highest-earning football club in the world, earned €487.6m in 2016–17 season. Based on social media activity from 2014 to 2015, Arsenal's fanbase is the fifth largest in the world. In 2018, Forbes estimated the club was the third most valuable in England, being worth $2.24 billion. Arsenal long standing Latin motto "Victoria Concordia Crescit" - ("Victory Through Harmony").

Football is a family of team sports that involve, to varying degrees, kicking a ball to score a goal. Unqualified, the word football normally means the form of football that is the most popular where the word is used. Sports commonly called football include association football (known as soccer in some countries); gridiron football (specifically American football or Canadian football); Australian rules football; rugby football (either rugby league or rugby union); and Gaelic football. These various forms of football are known as football codes. There are a number of references to traditional, ancient, or prehistoric ball games played in many different parts of the world. Contemporary codes of football can be traced back to the codification of these games at English public schools during the 19th century. The expansion of the British Empire allowed these rules of football to spread to areas of British influence outside the directly controlled Empire. By the end of the 19th century, distinct regional codes were already developing: Gaelic football, for example, deliberately incorporated the rules of local traditional football games in order to maintain their heritage. In 1888, The Football League was founded in England, becoming the first of many professional football competitions. During the 20th century, several of the various kinds of football grew to become some of the most popular team sports in the world.