Koriyama Castle 1540 - September

In early September, Motonari sent a small group of Ashigaru across the Tajii to provoke the Amako into attacking. When the Amako troops came out to drive them back, the Ashigaru fled back across the river to the safety of …

1540-09-15

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In early September, Motonari sent a small group of Ashigaru across the Tajii to provoke the Amako into attacking. When the Amako troops came out to drive them back, the Ashigaru fled back across the river to the safety of the castle. The Mori force that was waiting in Ambush, then took the Amako soldiers by surprise in their flank. The Amako were immediately routed and fled back to their camp.

Yoshida, Aki Province, Japan

By the end of the 1530s, Mōri Motonari had cut ties with the Amago clan (also known as Amago) and realigned himself with the Ōuchi. Taking advantage of the growing weakness of the Takeda clan of Aki, Motonari grew ever more powerful in Aki Province. By 1540, the old lord of the Amago, Tsunehisa had nominally retired and turned over the leadership of the clan to his grandson, Haruhisa (also known as Akihisa.) In that year Amago Haruhisa conceived of a plan to destroy Mōri Motonari and bring Aki province under the sway of the Amago. When a council of the Amago retainers was called to discuss the planned campaign, almost all spoke in favor of the attack. Amago Hisayuki, however, considered the risks to be too great and spoke out against it, but was derided by Tsunehisa as a coward and publicly humiliated. Hisayuki was given the task of engaging the Mōri's ally, the Shishido clan in Aki as part of an initial and concurrent operation of the larger Amago campaign into Aki.

Wikipedia: Siege of Koriyama

Mori

Amako