Wales' population rapidly declined.
North America 4 , also known as IRB North America 4 , was a North American rugby union competition launched in 2006 .. IRB. International Rugby Board. North America. North America. rugby union. rugby union. The competition was contested between two newly formed representative teams from each of Canada and the United States .. Canada. Canada national rugby union team. United States. United States national rugby union team. The competition was funded by the International Rugby Board -LRB- IRB -RRB- , and was part of their three-year global strategic investment programme which was designed to increase the competitiveness of international rugby union in Canada and the United States .. IRB. International Rugby Board. rugby union. rugby union. International Rugby Board. International Rugby Board. Canada. Canada national rugby union team. United States. United States national rugby union team. The tournament was intended to act as a pathway to more exposure of domestic players and the national sides -LRB- Canada and United States -RRB- .. Canada. Canada national rugby union team. United States. United States national rugby union team. The North America 4 has since been replaced by the Americas Rugby Championship as of September 7 , 2009 .. Americas Rugby Championship. Americas Rugby Championship. North America. North America. The new tournament features six teams , including four provincial sides from Canada playing in the Canadian Rugby Championship joined by the Argentina Jaguars and USA ` A ' .. Canada. Canada national rugby union team. Canadian Rugby Championship. Canadian Rugby Championship. Argentina Jaguars. Argentina Jaguars