Battle of Kotesashi
1333 CE.
Shown on the map at 35.797°, 139.423°.
The Battle of Kotesashi (小手指ヶ原の戦い, Kotesashi-gahara no tatakai) was part of the decisive Kōzuke-Musashi Campaign during the Genkō War in Japan that ultimately ended the Kamakura Shogunate. Fought in present-day Tokorozawa, Saitama on May 11, 1333, it pitted the anti-shogunate imperial forces led by Nitta Yoshisada against the pro-Shogunate forces of the Hōjō Regency led by Sakurada Sadakuni. The next day (May 12), the forces again engaged each other in the Battle of Kumegawa. The result of these two days was a victory for the Imperial forces who in less than one week marched 50 kilometers south and finally defeated the Shōgun's forces during the Siege of Kamakura.
Text from the Wikipedia article Battle of Kotesashi, licensed CC BY-SA 4.0.