Dec. 19 (UPI) -- On this date in history: In 1777, Gen. George Washington and the Continental Army began a winter encampment at Valley Forge, Pa. Advertisement In 1946 the First Indochina War began with Vietnamese troops under Ho Chi Minh clashing with the French at Hanoi. In 1958, the U.S. satellite SCORE (Signal Communications by Orbiting Relay Equipment), launched aboard an Atlas rocket, transmitted the first radio voice broadcast from space, a 58-word recorded Christmas greeting from