1585: Hideyoshi Becomes Kampaku and Pacifies Shikoku
In July, Hashiba Hideyoshi was appointed Kampaku (imperial regent), reaching the summit of court society. That same year, he dispatched a large army to Shikoku under his brother Hidenaga and other commanders, attacking Chōsokabe Motochika, who had nearly unified the island, and forcing his surrender. Motochika was allowed to keep only Tosa Province, and Hideyoshi's campaign to unify the realm advanced further still.
Events this year
Month 3
The armies of Hashiba Hideyoshi and Hidenaga attacked the Negoro and Saika groups and advanced their conquest of Kii Province.
Month 6
Mori forces crossed to Iyo, Hashiba Hidenaga and Hidetsugu landed in Awa, and the Ukita and Kuroda forces landed in Sanuki, attacking Chosokabe castles.
See this battle in detail →Sources 東京大学史料編纂所『大日本史料 第十一編之十七』／高知県「長宗我部元親と土佐の戦国時代」／香川県立図書館「香川県史年表」／徳島市立徳島城博物館「長宗我部元親書状」
Month 7
Following the Hashiba invasion of Shikoku, Chōsokabe Motochika submitted and was confirmed in Tosa Province.
See this battle in detail →Sources 東京大学史料編纂所『大日本史料 第十一編之十七』／高知県「長宗我部元親と土佐の戦国時代」／香川県立図書館「香川県史年表」／徳島市立徳島城博物館「長宗我部元親書状」
Hashiba Hideyoshi was appointed kampaku, gaining an imperial office through which to advance his rule over the country.
9/3
Toyotomi Hidenaga entered Kōriyama Castle with Hideyoshi and developed the castle and town as a base for governing Yamato, Kii, and Izumi.
Month 11
Date Masamune fought a coalition led by Satake Yoshishige and including the Ashina around Hitotoribashi. The Date army was hard pressed, but the coalition withdrew.
See this battle in detail →Sources 福島県「中世」／本宮市地域資料／南奥州の佐竹・伊達抗争に関する調査ノート
After the Shikoku campaign, Hachisuka Iemasa was granted Awa Province and built Tokushima Castle as his seat of government.