ARMISTICE DAY PARADE, 1919

The Armistice Day Riot

On Armistice Day, Tuesday, November 11, 1919, during a parade in
Centralia, Washington, a riot erupted that resulted in gunfire,
killing four veterans recently returned from the First World War.
Vigilantes rounded up anyone thought to be involved in the shootings,
put them in jail, and later that day lynched one of them.

Source:
http://freepages.genealogy.rootsweb.ancestry.com/~cainhome/remmen_album/emil_guard/centralia_tragedy.htm