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Rugby union is a full contact team sport, a form of football which originated in England in the early 19th century. One of the codes of rugby football, it is based on running with the ball in hand. It is played with an oval-shaped ball, outdoors on a level field, usually with a grass surface, up to 100 metres long and 70 metres wide.On each goal line are H-shaped goal posts.
Rugby union is played between two teams, each of which starts the match with 15 players on the field. During the match, players may be replaced or substituted (A player who has been replaced may not rejoin play unless he was temporarily replaced to have bleeding controlled; a player who has been substituted may return temporarily, to replace a player who has a blood injury, or permanently, if he is replacing a front-row forward