This year, 2008!
Wales won the Six Nations Championship in 2012 with a Grand Slam. This means that Wales won all 5 of their games.
Since the Six Nations began in 2000 Wales have won the trophy three times. They are the current champions winning with a grand slam victory in 2012. Their two other winning championships were in 2005 and 2008.
The Irish Women's Rugby team won the Grand Slam in 2013.
I believe your referring to "The Grand Slam"? This is part of the 6 nations tournament where the international side that wins ALL of its game achieves "the Grand Slam" . In New Zealand rugby, the 'Grand Slam' is achieved when the All Blacks tour and defeat all four 'Home' nations: Ireland, England, Scotland and Wales.
A grand slam is when in a six nations tournament a team has won every game they have played.
Since the Six Nations Rugby Championship came into being in 2000, Wales have won it twice - in 2005 and 2008. Both times they won it with a 'Grand Slam', which means they were unbeaten in all five of their matches.
In Rugby, It is in the six nations when Wales, England, Scotland, Ireland, Italy and France all compete against each other in 5 matches. home and away varies each year. The grand slam is one if a team beats all of its opponents with Wales won in 2012.
Scotland winning a Grand Slam
Wales were the winners of the 2008 Six Nations Championship. They were unbeaten in all their matches, so they achieved a 'Grand Slam'.
France defeated England 12-10 to clinch the 2010 RBS 6 Nations Grand Slam
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