Conditions were tragic, with weeks of rain, mud everywhere, and a frozen No Man’s Land between lines that were less than 45 meters apart in places. The worst atrocities, such as the chemical attacks in the Second Battle of Ypres, had not yet arrived, so the soldiers had seen battle, but not yet the “ultimate” industrial slaughter that would follow. There was even an attempt to establish an official truce. On December 7, Pope Benedict XVI appealed for “silence of the guns” at least on Christmas Eve, but political and military leaders showed no interest. Nevertheless, “small” initiatives pushed people toward the improbable, the frost stopped the rain, a light snow covered Flanders, and the Kaiser sent Christmas trees to the trenches; on December 23, German soldiers set them up outside the trenches and sang “Stille Nacht,” with the Allied lines responding with their own carols. Where the British faced Saxons, who were considered “more reliable” and had often worked in Britain before the war, communication became easier and the truce was more widely accepted, while in the French zones, due to the occupation of French territory by Germany, anger made fraternization much more difficult.
By Christmas Eve, some lower-ranking British officers had already adopted the informal logic of “live and let live” (“don’t shoot unless you are shot at”) and on Christmas morning, the Germans came out unarmed, waving their arms to show their peaceful intentions; when the British believed them, they came out too and met in No Man’s Land to socialize, exchange small gifts, even play football with them the next day. Censorship had not yet been imposed on correspondence; the letters talk about football, food, and drink with people who “yesterday” were mortal enemies, but also about joint burial ceremonies for the dead in the middle zone, and the tacit awareness that this peace would be temporary, so that both sides could take advantage of the truce to improve their trenches.
It wasn’t universal—fighting continued elsewhere, and commanders worried fraternisation could corrode discipline. Even so, the scale of men openly gathering between trenches in daylight made it one of the war’s most unsettling interruptions: proof that “enemy” was still, at least for a moment, a reversible category.

