Connecticut and Butler
It might help if you named the sport you're thinking of, an the nation in question.
Florida in 2006 and 2007
The Duke Blue Devils in NCAA Men's Basketball
The ACC has won 5 titles in the last 15 years. (Duke - 2001, Maryland - 2002, North Carolina - 2005, North Carolina - 2009, Duke - 2010)
Florida's Gators Have Won The 1996 Football & Basketball National TitlesThe University of Florida became the first IA College to win both the Basketball and the Football National Title during the same season.The Gators beat UCLA's Bruins for the hoops title and Ohio State's Buckeyes for the gridiron title.Neither game was close.I do believe that the Florida gators did the same exact thing in taking both of the titles in 2000-something, i think it was 2004 or 2005 but im not sure--Indeed they did & it was even better the 2nd time around because they beat OSU (buckeyes) for BOTH titles!
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Manchester United
Florida in 2006 & 2007, before them it was Duke back in 1991 & 1992.
46 years
n did princeton last win national championship in college basketball
University Of Kentucky