The First World War ended on this day 100 years ago (11 Nov 1918), when Germany surrendered to the Allies. The combatants then negotiated the Treaty of Versailles, which was signed on 28 June 1918, formally ending “the war to end all wars.” (As an aside, the Great War inspired a class of strategic games known as Blotto Games, and this branch of game theory has informed our understanding of civil litigation. For more, see our work-in-progress “The Colonel Blotto Litigation Game.”)