As a result, Katsuyori formed an allegiance with the Satake clan in Hitachi Province because he clashed with Oda in the west and at the same time needed a countermeasure against Hojo (the Kosa Allegiance (an allegiance between the Takeda clan in Kai Province and the Satake clan in Hitachi Province)).
そのため、勝頼は西の織田と対決すると同時に北条対策が必要になり、常陸国の佐竹氏との連携をはかっている（甲佐同盟）。