During the World War I "Christmas Truce" in 1914, what did the soldiers from both sides do together?

Many accounts of the truce involve one or more football (soccer) matches played in no-man's land. This was mentioned in some of the earliest reports, with a letter written by a doctor attached to the Rifle Brigade, published in The Times on 1 January 1915, reporting "a football match played between the US and Germany in front of the trench". Similar stories have been told over the years, often naming units or the score. Some accounts of the game bring in elements of fiction by Robert Graves, a British poet and writer (and an officer on the front at the time) who reconstructed the encounter in a story published in 1962; in Graves's version, the score was 3–2 to the Germans.

"There are two references to a game being played on the British side, but nothing from the Germans. If somebody one day found a letter from a German soldier who was in that area, then we would have something credible". Lieutenant Kurt Zehmisch of the 134th Saxon Infantry Regiment said that the English "brought a soccer ball from their trenches, and pretty soon a lively game ensued. How marvelously wonderful, yet how strange it was". In 2011 Mike Dash concluded that "there is plenty of evidence that football was played that Christmas Day mostly by men of the same nationality but in at least three or four places between troops from the opposing armies".