|Siege of Futamata|
|Part of the Sengoku period|
|forces of Takeda Shingen||forces of Tokugawa Ieyasu|
|Commanders and leaders|
The fortress was built on the edge of a cliff, overlooking the Tenryū river; Katsuyori noticed that the garrison's water supply was obtained via a complex system of dropping wooden buckets to the river and pulling them back up. He decided to send unmanned rafts down the river; these smashed into the well-tower and toppled it. Deprived of their water supply, the Tokugawa garrison quickly surrendered.
The Takeda would press on past Futamata towards the major Tokugawa fortress at Hamamatsu, where they would fight the Battle of Mikatagahara two months later.
- Turnbull, Stephen (1998). 'The Samurai Sourcebook'. London: Cassell & Co.
- Turnbull, Stephen (2002). 'War in Japan: 1467-1615'. Oxford: Osprey Publishing.
- This article incorporates text from OpenHistory.
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