The Red Ensign flown at Vimy Ridge in 1917 had the arms of Canada's first four provinces. In the Royal Warrant of 1868 assigning arms to the first four provinces of Canada, Queen Victoria authorized them to be quartered for use on the Great Seal of Canada and thus " de facto" they became the arms for Canada until 1921. After the battle, the flag was donated to the Imperial War Museum in the United Kingdom by Lieutenant Colonel Lorn Paulet Owen Tudor of the 5th Battalion, an Englishman who had emigrated to Canada before the war.