Don't Tell Me This Is the True History of the Three Kingdoms! is a Manga/Manhwa/Manhua in english language, Manhua series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.nl fastest updating comic site. The Summary is

I suddenly got hold of a feather fan, and came to an era of the Three Kingdoms which I completely do not know about. What? Gender equality? Girls can join the army? You, you and you, why are you all girls!? An interesting story unfolds in a familiar and yet, also unfamiliar time. But perhaps this is the Three Kingdoms, the true Three Kingdoms!