INTERACTIVE BATTLE
Keicho Dewa Campaign (Battle of Hasedo)
1600年9月 · Hasedo Castle, Dewa Province
An Uesugi army under Naoe Kanetsugu invaded Mogami territory but failed to take Hasedo Castle and withdrew after news of Sekigahara.
Background
After the Aizu expedition turned west, the Uesugi attacked Mogami territory amid both the national conflict and a long regional struggle over Shonai.
Outcome
Hasedo held out. After learning of the Western defeat at Sekigahara, the Uesugi withdrew to Okitama. The Uesugi were later reduced to Yonezawa and the Mogami enlarged.
Course of the battle
1 September 1600
The Uesugi invade Mogami territory2 September 1600
Hasedo Castle withstands the attackHistorical significance
The campaign is treated not merely as a northern Sekigahara but as a regional war over Shonai, Okitama, and the Yamagata basin.
Key figures
Other events of 1600
Notes on the data
Troop totals, losses, and individual exploits are limited to what the research note supports.
Sources consulted
- 山形市「長谷堂城跡」
- 山形城公式「歴代城主」
- 山形市地域教材「長谷堂合戦」
The numbers in the text refer to the list above. Certainty indicates how far a statement is supported by the cited sources; it does not refer to the precision of the coordinates or the dating.
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