At the battle of Bicchu Takamatsu Castle Hideyoshi requested Nobunaga for relief column because of difficult situation as Terumoto MORI, Motoharu KIKKAWA and Takakage KOBAYAKAWA came to save Takamatsu Castle.
秀吉は備中高松城攻めのとき、毛利輝元・吉川元春・小早川隆景らが高松城の救援に出てきたため、信長に苦境を訴えて援軍を要請した。