Siege of Gassantoda Castle

The Siege of Gassantoda Castle (月山富田城の戦い, Gassan Toda-jō no Tatakai) was a battle during the Sengoku period (16th century) of Japan. The siege of the castle was personally led by Ōuchi Yoshitaka against Gassantoda Castle located within Izumo Province, under the control of Amago Haruhisa.

Siege of Gassantoda Castle (1542)
Date1542–1543
Location
Gassantoda Castle, Izumo Province
Result Amago clan victory
Belligerents
Amago clan Ōuchi clan
Mōri clan
Commanders and leaders
Amago Haruhisa Ōuchi Yoshitaka
Mori Motonari
Hironaka Takakane

In this battle Mori Motonari penetrated deep into the Amago clan territory but their supply line was broken and Kikkawa Okitsune (吉川興経) betrayed them. Motonari surrounded Gassantoda castle (富田城) but the Ōuchi troops retreated. During the retreat Motonari almost lost his life, but his general, Watanabe Hajime tried to sacrifice his life, so he can get away by fighting to the death. Motonari returned safely to Aki Province.

After a long, hard-fought siege, Haruhisa ended in victory, and as a result of the battle, the power of the Ōuchi clan weakened.

Yoshitaka, who had failed in his attempt, withdrew to Yamaguchi, in which he indulged himself with "more and more in pleasures", until he was deposed by his retainer, Sue Harukata, in the Tainei-ji incident.[1]

Siege of Gassantoda Castle (1565)[2]
Date1565–1566
Location
Gassantoda Castle, Izumo Province
Result Mōri clan victory
Belligerents
Amago clan Mōri clan
Commanders and leaders
Amano Yoshihisa
Amago Tomohisa
Uyama Hisakane		 Mōri Motonari
Kikkawa Motoharu
Kobayakawa Takakage
Siege of Gassantoda Castle (1569)[2]
Date1569
Location
Gassantoda Castle, Izumo Province
Result Mōri clan victory
Belligerents
Mōri clan Amago clan
Commanders and leaders
Amano Takashige Amago Katsuhisa
Yamanaka Yukimori
Tachihara Hisatsuna

References
  1. Turnbull, Stephen (1998). The Samurai Sourcebook. Cassell & Co. p. 209. ISBN 1854095234.
  2. "History of Gassantoda Castle" (in Japanese). Yasugi-city Tourism Association. Retrieved 27 October 2021.


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