<P> The 1983 America 's Cup was the occasion of the first winning challenge to the New York Yacht Club , which had successfully defended the cup over a period of 132 years . An Australian syndicate representing the Royal Perth Yacht Club fielded the Australia II , skippered by John Bertrand , against defender Liberty , skippered by Dennis Conner . Australia II won the match races to win the America 's Cup , ending the longest winning streak in sporting history and ending U.S. domination of the racing series . </P>
when did australia 2 win the america 's cup
1983