It was World War I, and it was Christmas Eve. The German and British soldiers were dug in just hundreds of yards apart, but it turned out to be much more than just another tense and violent night on the battlefield. It began when one German soldier began singing "Silent Night" from his trench. Pretty soon he was joined in German by many more of his fellow soldiers. Amazingly, the voices of hundreds of British soldiers began to join in the carol from their trenches. Now that has to have been a moment those soldiers never forgot - opposing armies singing "Sleep in heavenly peace" in the middle of a battlefield.