On November 11, 1889, the State of Washington was admitted as the 42nd State of the United States.
In 1918, German officials signed an armistice agreement with the Allies in a railroad car in the forest of Compiègne, France. The fighting officially ended at 11:00 a.m. — the eleventh hour of the eleventh day of the eleventh month. The war officially ended with the signing of the Treaty of Versailles on June 28, 1919.
In 1921 on this date, U.S. President Warren G. Harding dedicated the Tomb of the Unknowns at Arlington National Cemetery.