Answer:
Football, or American Soccer.
Explanation:
What is important to note is that not all soldiers participated in football matches, but only a select few throughout isolated parts of the warzone. However, the Christmas truce did occur, and lasted officially from December 24 - 25, 1914, though there were instances where the truce lasted longer, due to the soldiers not wanting to fight each other. The Christmas Truce only occurred in 1914, and while there may have been attempts to resurrect the Christmas truce in later years, it did not come into fruition.
Learn more about the Christmas truce, here:
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