1600: Battle of Sekigahara and Postwar Reorganization - Sengoku Shogun Map
The Western Army led by Ishida Mitsunari and the Eastern Army led by Tokugawa Ieyasu confronted each other on a nationwide scale. In October, the Eastern Army won a decisive victory at Sekigahara. Preliminary battles were fought at Fushimi, Gifu, Otsu, Ueda, and in the northern provinces. After the war, massive reassignments, dispossessions, and rewards reshaped the daimyōs, solidifying Tokugawa supremacy.
Major events
- 1600-07: Siege of Fushimi Castle Begins — After Tokugawa Ieyasu marched toward Aizu, the Western Army surrounded Fushimi Castle, defended by Torii Mototada and his garrison.
- 1600-08-01: Fall of Fushimi Castle — Fushimi Castle fell and burned after the Western Army's assault, and its commander Torii Mototada and the garrison were killed.
- 1600-08-23: Fall of Gifu Castle — Eastern Army commanders including Fukushima Masanori and Ikeda Terumasa captured Gifu Castle from Oda Hidenobu, securing the route through the Tōkaidō region.
- 1600-09: Second Battle of Ueda — Tokugawa Hidetada's army attacked Ueda Castle, defended by Sanada Masayuki and Nobushige, but failed to take it and was delayed on its westward march.
- 1600-09-15: Battle of Sekigahara — The decisive battle in Mino: Tokugawa Ieyasu’s Eastern Army defeats the Western Army.