The Centralia Tragedy, also known as the Centralia Conspiracy and the Armistice Day Riot, was a violent and bloody incident that occurred in Centralia, Washington, on November 11, 1919, during a parade celebrating the first anniversary of Armistice Day. The conflict between the American Legion and Industrial Workers of the World (IWW or "Wobblies") members resulted in six deaths, others being wounded, multiple prison terms, and an ongoing and especially bitter dispute over the motivations and events that precipitated the event. It was the culmination of years of bad blood between members of the local American Legion and the IWW. Both Centralia and the neighboring town of Chehalis had a large number of World War I veterans, with robust chapters of the Legion and many IWW members, some of whom were also war veterans.