Ireland national rugby union team tournament. It is contested against England, France, Italy, Scotland and Wales. Ireland was a member of the inaugural Home Nations in 1883, with France and Italy joining later to form the Five and Six Nations respectively. Ireland won their first championship in 1894, also winning the Triple Crown. Ireland's first Grand Slam occurred in the 1948 season and their second in the 2009 season. In total Ireland have been outright champions on fourteen occasions following their title in the 2018 Six Nations Championship and have nine shared wins. Ireland won their third ever Grand Slam in the 2018 Six Nations
Grand Slam (rugby union) are awarded the Six Nations trophy (as tournament winners), but there is no special grand slam trophy – the Grand Slam is an informal honour recognizing a Championship-winning team which has won all their games. Although the term "grand slam" had long been in use in the game of contract bridge, the first time that the expression is known to have been applied to rugby union was in 1957, in a preview of a match between England and Scotland: The Grand Slam honour is applied retroactively to teams which won all of their matches in Five Nations tournaments before the