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) made a Five Nations Grand Slam in 1912–13 and 1951–52. Grand Slams by touring teams have been achieved nine times: four times each by South Africa and New Zealand, and once by Australia. Australia is the only country to have lost against all four home nations, on their 1957–58 tour, also Australia lost to France on the tour. After 1984, Southern Hemisphere sides started to tour the British Isles more frequently, but to play fewer Tests on each tour, and thus there were no Grand Slam tours between 1984 and 1998. However, since 1998 Grand Slam tours have become quite