Battle of Ueno
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The Battle of Ueno was a battle of the Boshin War, which occurred on July 4, 1868, between the troops of the Shōgitai under Shibusawa Seiichirō and Amano Hachirō, and Imperial "Kangun" troops. Wikipedia
Location: Ueno
Date: July 4, 1868
2,000 Imperial troops 10,000 reinforcements: 2,000 Bakufu troops, 1,000 (during the first battle)