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In page Oda Nobunaga:

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The following morning, 30 July 1570, the battle began. Tokugawa Ieyasu joined his forces with Nobunaga, with the Oda and Azai clashing on the Anegawa east river while Tokugawa and Asakura grappled on the west of the river. The battle turned into a melee fought in the middle of the shallow Anegawa River.[citation needed]