The first battle of Uji is famous and important for having opened the Genpei War.
In early 1180, Prince Mochihito, the Minamoto Clan's favored claimant to the Imperial Throne, was chased by Taira forces to the Mii-dera, a temple just outside Kyoto. Due to the interference of a Mii-dera monk with Taira sympathies, the Minamoto army arrived too late to help defend the temple.Minamoto no Yorimasa and Prince Mochihito, along with a force of about fifteen hundred men including the warrior monks of Mii-dera and the Watanabe clan, fled south towards Nara. They crossed the Uji River, just outside the Byōdō-in, and tore up the planks of the bridge behind them to prevent the Taira following them.Three warrior monks in particular are named in the Heike Monogatari: Gochi-in no Tajima, Tsutsui Jōmyō Meishū, and Ichirai Hōshi.
Wikipedia https://en.wikipedia.org/wiki/Battle_of_Uji_(1180)
Address (Unnamed Road), Kyoto, Japan
Coordinates 34°53'34.807" N 135°48'22.802" E