First Siege of Takatenjin
1574 CE.
Shown on the map at 34.698°, 138.035°.
The first siege of Takatenjin occurred in 1574, when it was attacked by the forces of Takeda Katsuyori. The garrison was commanded by Ogasawara Nagatada, who held the fortress for Tokugawa Ieyasu. Nagatada surrendered to the Takeda clan, and became a Takeda retainer, receiving the Omosu District of Suruga Province as a fief, where he would remain relatively neutral until the Invasion of Kai Province during 1582.
Text from the Wikipedia article Siege of Takatenjin (1574), licensed CC BY-SA 4.0.