Ōgo War

The Ōgo War [睞关戦 おおご・きょう], also known as the Hanmi Conflict [班源蒔], was a civil war fought in the late 14th century between the Hanmi administration and the Yūtei clan from 1369 to 1372. It is named for the fact that the conflict resulted in the Hanmi being overthrown and the Yūtei becoming the next kunjō of Kanton.
The Hanmi clan rose to become the second kunjō of Kanton after the Mizake in 1368, by the decree of the Emperor. The kunjō system had been in place for just over a century, and took the form of a de facto military government which ruled from the city of Kaneguro in modern-day Mii Prefecture. After the fall of the Mizake, there was heated competition between clans as to who would be appointed next. When the Hanmi were chosen, there was widespread discontent, which resulted in a rebellion led by the Yūtei clan.
== Events ==
In 1368, Yūtei no Hōsō plotted to seize power through force and overthrow the Hanmi administration by encouraging his vassals and other anti-Hanmi clans to rebel. However, Hōsō was betrayed when his advisor Onaka no Asahi alerted the kunjō, who dispatched troops to Umewa Province in order to suppress the uprising. Yūtei no Hōsō fled the province and sought refuge in the monastery at Ei'an Temple in Eiita Province. Because the temple could not be seiged, Hōsō was instead exiled to the Summui Islands.
In 1370, Hōsō escaped the islands roughly thirteen months after his exile with the help of a local warlord, raising a new army in northern Kantai Province. He defeated the Imperial forces at the Battle of Mount Shigumo and gained the support of the Kantai clan, along with their vassals and a number of other local powers. Meanwhile, Kanma no Takakō, the chief general of the Hanmi, was dispatched north to fight against Hōsō's second uprising; however, for unknown reasons he defected to the Yūtei side shortly after and began to fight against the Imperial army. It is possible that Takakō had hopes of being named konbūshin by Hōsō after his rise to power. 
The Yūtei forces went on to win a string of victories in their campaign through northern Kanton, pushing the Imperial army further backwards. The Hanmi forces were eventually defeated at the Siege of Kaneguro in 1372, when Hōsō and his army gained entry to the city and the manza Hanmi no Ai was forced to commit suicide.
The Yūtei went on to govern the country for another fifty years, with Hōsō's son Yūtei no Hatsumi going on to become the second manza after his father's death in 1420.