Wikipedia:
Background
The first months of World War I had seen an initial German attack through Belgium into France, which had been repulsed outside Paris by French and British troops at the Battle of the Marne in early September 1914. The Germans fell back to the Aisne valley, where they prepared defensive positions. In the subsequent Battle of the Aisne, the Allied forces were unable to push through the German line, and the fighting quickly degenerated into a static stalemate; neither side was willing to give ground, and both started to develop fortified systems of trenches. To the north, on the right of the German army, there had been no defined front line, and both sides quickly began to try to use this gap to outflank one another; in the ensuing "Race to the Sea", the two sides repeatedly clashed, each trying to push forward and threaten the end of the other's line. After several months of fighting, during which the British forces were withdrawn from the Aisne and sent north into Flanders, the northern flank had developed into a similar stalemate. By November, there was a continuous front line running from the North Sea to the Swiss frontier, occupied on both sides by armies in prepared defensive positions.
In the lead up to Christmas 1914, there were several peace initiatives. The Open Christmas Letter was a public message for peace addressed "To the Women of Germany and Austria", signed by a group of 101 British women suffragists at the end of 1914 as the first Christmas of World War I approached. Pope Benedict XV, on 7 December 1914, had begged for an official truce between the warring governments. He asked "that the guns may fall silent at least upon the night the angels sang." This attempt was, though, officially rebuffed.
Christmas 1914
Though there was no official truce, about 100,000 British and German troops were involved in unofficial cessations of fighting along the length of the Western Front. Through the week leading up to Christmas, parties of German and British soldiers began to exchange seasonal greetings and songs between their trenches; on occasion, the tension was reduced to the point that individuals would walk across to talk to their opposite numbers bearing gifts.
The Germans placed candles on their trenches and on Christmas trees, then continued the celebration by singing Christmas carols. The British responded by singing carols of their own. The two sides continued by shouting Christmas greetings to each other. On Christmas Eve and Christmas Day, many soldiers from both sides – as well as, to a lesser degree, from French units – independently ventured into no man's land, where they mingled, exchanging food, tobacco, alcohol, and souvenirs. As well as joint burial ceremonies, several meetings ended in carol-singing or games of football.
The truce is seen as a symbolic moment of peace and humanity amidst one of the most violent events of modern history. It was not ubiquitous, however; in some regions of the front, fighting continued throughout the day, whilst in others, little more than an arrangement to recover bodies was made. The following year, a few units again arranged ceasefires with their opponents over Christmas, but to nothing like the widespread extent seen in 1914; this was, in part, due to strongly worded orders from the high commands of both sides prohibiting such fraternization.
The truces were not unique to the Christmas period, and reflected a growing mood of "live and let live", where infantry units in close proximity to each other would stop overtly aggressive behavior, and often engage in small-scale fraternization, engaging in conversation or bartering for cigarettes. In some sectors there would be occasional ceasefires to go between the lines and recover wounded or dead soldiers, whilst in others there would be a tacit agreement not to shoot while men rested, exercised, or worked in full view of the enemy. However, the Christmas truces were particularly significant due to the number of men involved and the level of their participation - even in very peaceful sectors, dozens of men openly congregating in daylight was remarkable.
Later Truces
In the following months, there were a few sporadic attempts at truces, and in December there were explicit orders by the Allied commanders to forestall any repeat of the previous Christmas truce. The prohibition was not completely effective, however, and a small number of brief truces occurred. But in the later years of the war, December 1916 and 1917, German overtures to the British for truces were recorded without any success.
Evidence of a
Christmas 1916 truce, previously unknown to historians, has recently come to light. In a letter home, 23-year-old Private Ronald MacKinnon told of a remarkable event that occurred on December 25, 1916, when German and Canadian soldiers reached across the battle lines near Vimy Ridge to share Christmas greetings and trade presents. "Here we are again as the song says," the young soldier wrote. "I had quite a good Xmas considering I was in the front line. Xmas eve was pretty stiff, sentry-go up to the hips in mud of course. ... We had a truce on Xmas Day and our German friends were quite friendly. They came over to see us and we traded bully beef for cigars."
Public Awareness
The events of the truce were not reported for a week, in an unofficial press embargo which was eventually broken by the
New York Times on 31 December. The British papers quickly followed, printing numerous first-hand accounts from soldiers in the field, taken from letters home to their families, and editorials on "one of the greatest surprises of a surprising war". By January, both the
Mirror and
Sketch printed front-page photographs of British and German troops mingling and singing between the lines. The tone of the reporting was strongly positive, with the
Times endorsing the "lack of malice" felt by both sides and the
Mirror regretting that the "absurdity and the tragedy" would begin again.
Coverage in Germany was more muted, with some newspapers strongly criticizing those who had taken part, and no pictures published. In France, meanwhile, the greater level of press censorship ensured that the only word that spread of the truce came from soldiers at the front or first-hand accounts told by wounded men in hospitals.
More information:
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Washington Post: "A Victory for Human Kindness"
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NY Times: Excerpts from Letters, Journals, and Memoirs