After the collapse of the original North American Soccer League (1968–1984), and Canada's participation in the 1986 FIFA World Cup the original Canadian Soccer League (1987–92) started operations as a nationally based CSA sanctioned Division 1 league.
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When Major League Soccer (MLS) won the USSF's competition for USA Division 1 status in 1993, the APSL lost teams in 1996 in Denver, Los Angeles, and New York when MLS started three years later.
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