<Table> <Tr> <Td> </Td> <Td> This article includes a list of references, but its sources remain unclear because it has insufficient inline citations . Please help to improve this article by introducing more precise citations . (July 2016) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This article includes a list of references, but its sources remain unclear because it has insufficient inline citations . Please help to improve this article by introducing more precise citations . (July 2016) (Learn how and when to remove this template message) </Td> </Tr> <P> In rugby union, a Grand Slam (Irish: Caithréim Mhór . Welsh: Y Gamp Lawn. French: Grand Chelem) occurs when one team in the Six Nations Championship (or its Five Nations predecessor) manages to beat all the others during one year's competition . This has been achieved 39 times in total, for the first time by Wales in 1908, and most recently by Ireland in 2018 . The team to have won the most Grand Slams is England with 13 . </P> <P> In another context, a Grand Slam tour refers to a touring side--South Africa, Australia or New Zealand--which plays fixtures against all four home nations (England, Ireland, Scotland and Wales) during their tour . If the tourists then win all of those matches, they are said to have achieved a Grand Slam . This has been done nine times, first by South Africa in 1912--13, and most recently by New Zealand in 2010 . </P>

When was the last time ireland won the grand slam in rugby