The truce between the trenches in Christmas 1914 is one of the most famous stories from World War I. Was it one big truce across the whole Western Front? Or was it lots of little ceasefires? How did it happen, and what did the soldiers do during the Christmas Truce? Did they become friends for a day? Did they play football? Did they exchange cigarettes and pose for pictures? Professor Theresa Blom Crocker explains all!