Complex sentence: The 2012 Conference USA Men's Soccer Tournament was the 18th postseason tournament to decide the Conference USA champion and guaranteed representative into the 2012 NCAA Division I Men's Soccer Championship.
Split into simpler sentences: The 2012 Conference USA Men's Soccer Tournament was the eighteenth edition of the Conference USA Men's Soccer Tournament. The tournament decided the Conference USA champion and guaranteed representative into the 2012 NCAA Division I Men's Soccer Championship.