The Civil War of Wa or Great Rebellion of Wa (倭国大乱, wakoku tairan) was a period of disturbances and warfare in ancient Japan (Wa) during the late Yayoi period (2nd century AD). It is the oldest war in Japan that has been documented in writing. Peace was restored around 180, when the shaman queen Himiko (Pimiko) of Yamatai-koku took control of the region.[1][2]