in 981, there were a number of armed conflicts between Enryaku-ji and Mii-dera, each the head temple of a different sub-sect of Tendai. These disputes were, as before, over political appointments and dishonorable etiquette. More often than not, these were cases of members of one faction being chosen as the abbot of the other faction's temple, and the monks would protest. This continued, on and off, once stopping for as long as 40 years, through the 11th and into the 12th century. The armies became larger and the violence increased, until in 1121 and 1141 Mii-dera was burned to the ground by monks from Enryaku-ji. Other temples became embroiled in the conflicts as well, and Enryaku-ji and Mii-dera united against Kōfuku-ji, and, another time, against Kiyomizu-dera. Genpei War At the end of the 12th century, Japan was plunged into the Genpei War and, while the feuds between the temples did not end, they became subsumed by larger events. The warring Minamoto and Taira clans both tried to obtain the aid of the warrior monks of Nara and Kyoto, adding the temples' forces to the clans' already mighty armies of samurai. Taira no Kiyomori sent generous gifts of rice and silk to Enryakuji, ensuring they would not help his enemies, the Minamoto, who had allied themselves with the monks of Mii-dera. In the Battle of Uji in 1180, one of the more famous battles in which sōhei participated, the monks of Mii-dera, along with a force of Minamoto samurai, tried to defend the bridge over the Uji River, and the Byōdō-in, a temple behind it, from an attacking Taira force. The monks pulled up the planks of the bridge to impair the ability of the horse mounted samurai to cross. The warrior monks stood their ground with bow and arrow, naginata, sword and dagger, but were ultimately defeated. Following his victory, Taira no Kiyomori ordered that revenge be taken upon the monks that opposed him. Mii-dera was burned to the ground once again, as were many of the temples of Nara. Only the Enryaku-ji escaped unscathed. Three years later, when Minamoto no Yoshinaka betrayed his clan by storming into Kyoto, setting the Hōjōji Palace aflame and kidnapping Emperor Go-Shirakawa, he was opposed by many of the monks of Kyoto, including those from Mount Hiei. 13th–14th centuries and the rise of Zen Following the Genpei War, the monasteries, to a large extent,