Box lacrosse is typically penalized with expulsion and suspensions. In 1990, when the Six Nations created the new Mohawk lacrosse league, fighting was specifically targeted as unacceptable. Violators were ejected from the game in which the altercation occurred and given a minimum three game suspension. Box lacrosse is the most popular version of the sport in the Czech Republic. It is also played to a marginal degree in Australia, primarily by players who have played field lacrosse. Club level box lacrosse leagues in the United States have increased the number of players exposed to the sport, including the: Baltimore Indoor Lacrosse League,
Field lacrosse member William George Beers codified the modern game. He established the Canadian Lacrosse Association and created the first written rules for the game, "Lacrosse: The National Game of Canada". The book specified field layout, lacrosse ball dimensions, lacrosse stick length, number of players, and number of goals required to determine the match winner. Field lacrosse involves two teams, each competing to shoot a lacrosse ball into the opposing team's goal. A lacrosse ball is made out of solid rubber, measuring 7.75 to 8 inches (19.7–20 cm) in circumference and weighing 5 to 5.25 ounces (140–149 g). Each team plays with