Throughout Oregon, on Friday, Nov. 11 at 11 a.m., houses of worship and fire departments are asked to observe the 21- second moment of silence and/or toll bells 21 times to commemorate the sacrifice of the Unknown Soldier interred at Arlington National Cemetery.

World War I, the “wars to end all wars,” was officially ended in the 11th hour of the 11th day of the 11th month of 1918. Exactly three years later, on Nov. 11, 1921, an unknown American soldier from that war was buried with full military honors at Arlington National Cemetery in Arlington, Va.