The term wave is often intuitively understood as referring to a transport of spatial disturbances that are generally not accompanied by a motion of the medium occupying this space as a whole. In a wave, the energy of a vibration is moving away from the source in the form of a disturbance within the surrounding medium (Hall 1980, p. 8).
The first soldier to be buried in Arlington was Private William Henry Christman of Pennsylvania on May 13, 1864. There are 396 Medal of Honor recipients buried in Arlington National Cemetery, nine of whom are Canadian.
Congress passes legislation approving the establishment of a Tomb of the Unknown Soldier in Arlington National Cemetery. November 11 is chosen for the date of the ceremony. According on October 20, Congress declares November 11, 1921 a legal Federal holiday to honor all those who participated in the war.