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The original was posted on /r/todayilearned by /u/Ill_Definition8074 on 2025-09-25 09:57:15+00:00.

Original Title: TIL In 1st century China there were two rebellions were led by a peasant faction called the “Red Eyebrows”. They painted their eyebrows red so they could easily tell which soldiers were on their side during a battle.