On July 29th 1914, the world's peace was shattered as the artillery of Austria-Hungary began shelling the troops of the country to its south, Serbia. What followed was like a row of falling dominoes as one European country after another rushed into war. Soon most of Europe was fighting in a calamitous conflict that could have been avoided. This was, of course, the First World War. But who could have guessed that on December 25 troops in the trenches on the western front would openly defy their commanding officers by stopping the fighting and having a spontaneous celebration of Christmas with their 'enemies'?