Why did Tokugawa Hidetada fail to arrive at the Battle of Sekigahara on time?

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Tokugawa Hidetada failed to arrive at the Battle of Sekigahara on time because he disobeyed his father's orders. While Tokugawa Ieyasu had directed Hidetada to move northwest along the Nakasendō road to join the main force in Mino province, Hidetada instead chose to besiege Ueda Castle. This unauthorized diversion prevented his force of 36,000 men from connecting with the other Tokugawa armies in time for the conflict.1