The last surviving WW1 Veteran was a woman. She was a waitress at an airbase.
The last living veteran of World War I was Florence Green, a British citizen who served in the Allied armed forces, and who died 4 February 2012, aged 110. The last combat veteran was Claude Choules who served in the British Royal Navy (and later the Royal Australian Navy) and died 5 May 2011, aged 110. The last veteran who served in the trenches was Harry Patch (British Army) who died on 25 July 2009, aged 111. The last Central Powers veteran, Franz Künstler of Austria-Hungary, died on 27 May 2008 at the age of 107.
The total number of participating personnel is estimated by the Encyclopedia Britannica at 65,038,810. There were approximately 9,750,103 military deaths during the conflict.
Veterans, for this purpose, are defined as people who were members of the armed forces of one of the combatant nations up to and including the date of the Armistice. This policy may vary from the policy in actual use in some countries.