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The original was posted on /r/todayilearned by /u/AlabamaHotcakes on 2025-07-10 23:53:10+00:00.

Original Title: TIL after the Crimean War, Queen Victoria praised soldiers’ facial hair as the mark of “real fighting men”. Mustaches became mandatory until 1916, mainly because gas masks required a proper seal, prompting the army to drop the almost 60 year old rule and made them optional.