The first professional box lacrosse games were held in 1931. That summer, the arena owners formed the "International Lacrosse League", featuring four teams: the Montreal Canadiens, Montreal Maroons, Toronto Maple Leafs, and Cornwall Colts. The league lasted only two seasons. In the wake of the original "International Lacrosse League" opened the "American Box Lacrosse League" featuring six teams: two in New York City, and one each in Brooklyn, Toronto, Boston, and Baltimore. The league played to small crowds on outdoor fields such as Yankee Stadium and Fenway Park, before closing midway through its inaugural season. Lacrosse was officially declared Canada's National Summer Sport with the passage of the (Bill C-212) on May 12, 1994.