Nov. 25 (UPI) -- On this date in history: In 1783, more than 6,000 British troops evacuated New York City after signing the peace treaty ending the Revolutionary War. Advertisement In 1947, film industry executives introduced the first Hollywood blacklist banning people accused of communist sympathies from working in the film industry. The blacklist came about after 10 directors, producers and actors refused to testify before the House Un-American Activities Committee. In 1952, Agatha Christie'