State visit of the President of Ireland to the United Kingdom with full cavalry escort to Windsor Castle, where the President, accompanied by the Duke of Edinburgh, inspected a Guard of Honour provided by the 1st Battalion Irish Guards. President Higgins presented a ceremonial red coat to its regimental mascot, an Irish Wolfhound called Domhnall of Shantamon. The President viewed Irish-related items from the Royal Collection at Windsor Castle. Afterwards they departed for London and visited Westminster Abbey for a tour, where the President laid a wreath at the Grave of the Unknown Warrior and paid his respects with a bow to the tomb of Louis, the Earl of Mountbatten. After
Canadian Tomb of the Unknown Soldier became part of the project of creating a tomb of the unknown soldier for Canada, as part of the Canada Millennium Partnership Program. The Cabinet asked the Commonwealth War Graves Commission to select one of the 1,603 graves of unknown Canadians buried in the vicinity of Vimy Ridge. Chosen was Grave 7, in Row E of Plot 8 of the Cabaret-Rouge British Cemetery in Souchez, France, near the memorial at Vimy Ridge, the site of the first major battle where all four Canadian divisions fought together as a combined force. The remains of the soldier buried there were exhumed on