/r/Battlefield mod here, the upcoming "battlefield one" will be in WW1. People are asking for the christmas day snowball fight in the campaign. Was there actually a snowball fight? According to a commercial i saw they sang together?
While more answers are welcome, we've had an excellent answer on this very question in the past, courtesy of /u/georgy_k_zhukov.
Hey /u/sloth_on_meth! In addition to /u/georgy_k_zhukov's excellent answer, I've also given [one] (https://www.reddit.com/r/AskHistorians/comments/3y161u/how_much_of_1914_christmas_truce_is_historical/) about the Truce, and how memory of it evolved over time.