Rules of the Game: For FIFA matches, the ball should weigh not more than 450 g (16 oz) and not less than 410 g (14 oz) at the start of the match.
FIFA is made of of six confederations: AFC, CAF, CONMEBOL, CONCACAF, OFC and UEFA.
The first soccer league in the United States was the American Football Association, which existed from 1884-88.
The United States played its first-ever official international soccer match on August 20, 1916 against Sweden in Stockholm.
London's new Wembley Stadium, which opened in 2007, has a seating capacity of 90,000.