Changes

'''Rugby''' was derived in [[England]] at around the same time as Soccer, initially at [[Rugby School]]. This version uses an elliptical ball with the main aim being to ground the ball over the opponents' goal line to score a try.  Kicking and passing are permitted, but all passes must be backward.  There are two versions of the sport, [[Rugby Union]] and [[Rugby League]]. Each uses a different numbers of players and slightly different rules.  Rugby is popular in the [[U.K.]], [[France]], [[Ireland]], [[Australia]], [[South Africa]], [[New Zealand]] and throughout the South Pacific.  The ultimate competition for this sport is the [[Rugby World Cup]] held every four years.

'''Rugby''' was derived in [[England]] at around the same time as Soccer, initially at [[Rugby School]]. This version uses an elliptical ball with the main aim being to ground the ball over the opponents' goal line to score a try.  Kicking and passing are permitted, but all passes must be backward.  There are two versions of the sport, [[Rugby Union]] and [[Rugby League]]. Each uses a different numbers of players and slightly different rules.  Rugby is popular in the [[U.K.]], [[France]], [[Ireland]], [[Australia]], [[South Africa]], [[New Zealand]] and throughout the South Pacific.  The ultimate competition for this sport is the [[Rugby World Cup]] held every four years.

'''American football''' was created in the nineteenth century and was derived from Rugby. Originally played at the college level, professional teams were created in 1920.  This version uses a smaller ball than rugby and is the most popular form of football in the U.S. but is rarely played outside that country.  The main difference from rugby is that the game is broken up into a series of plays, each ending when the ball touches the ground, and that for each play the offensive team is allowed one forward pass.  In addition the ball does not need to be grounded to score, but simply carried into the end zone.  The ultimate competition for this sport is the [[National Football League]].

'''American football''' was created in the nineteenth century and was derived from Rugby. Originally played at the college level, professional teams were created in 1920.  This version uses a smaller ball than rugby and is the most popular form of football in the U.S. but is rarely played outside that country.  The main difference from rugby is that the game is broken up into a series of plays, each ending when the ball touches the ground, and that for each play the offensive team is allowed one forward pass.  In addition the ball does not need to be grounded to score, but simply carried into the end zone.  The ultimate competition for this sport is the [[National Football League]]. Other professional leagues exist, many with rules variations. An example is the Canadian Football League, which has a larger field, three downs instead of four, and a number of other differences from American football. Another is the Arena Football League, where games are played indoors on a shortened field.

==Comparison chart==

==Comparison chart==