Battle of Nagara-gawa
1556 CE.
Shown on the map at 35.445°, 136.763°.
The Battle of Nagara-gawa (長良川の戦い, Nagara-gawa no tatakai) took place along the banks of the Nagara River in the former Mino Province in April 1556. The site of the battle is in present-day Gifu city, Gifu Prefecture, Japan. It was a battle between Saitō Dōsan and his son, Saitō Yoshitatsu, who had instigated a coup d'etat.
Text from the Wikipedia article Battle of Nagara-gawa, licensed CC BY-SA 4.0.