Kagemori, who was a hard-liner for defeat of the Miura clan, screwed his child, Yoshikage ADACHI, and his grandchild, Yasumori ADACHI, who had reconciled themselves to the lee of the Miura clan, over their tameness, and persuaded Tokiyori, who leant toward compromise with the Miura clan, into starting the Battle of War by taking every measure such as act of provoking the Miura clan together with the family, and so on; as a consequence, approximately 500 people of the Miura clan were killed and the Miura clan fell.
景盛は三浦打倒の強硬派であり、三浦氏の風下に甘んじる子の安達義景や孫の安達泰盛の不甲斐なさを厳しく叱責し、三浦氏との妥協に傾きがちだった時頼を説得して一族と共に三浦氏への挑発行動を取るなどあらゆる手段を尽くして宝治合戦に持ち込み、三浦一族500余名を滅亡に追い込んだ。