Editing Tokugawa Ieyasu (section)

===Battle of Sekigahara===
{{Main|Battle of Sekigahara}}
[[File:Sekigahara Tokugawa's Final Encampment.jpg|thumb|Tokugawa Ieyasu last position during the battle]]

The Battle of Sekigahara was the biggest [[List of Japanese battles|battle]] as well as one of the most important in Japanese feudal history. It began on October 21, 1600. The Eastern Army led by Tokugawa Ieyasu initially numbered 75,000 men, with the Western Army at a strength of 120,000 men under [[Ishida Mitsunari]]. Ieyasu had also secretly acquired a supply of [[arquebus]]es.

Knowing that the [[Tokugawa clan|Tokugawa]] forces were heading towards [[Osaka]], Mitsunari decided to abandon his positions and marched to Sekigahara. Even though the Western Army had tremendous tactical advantages, Ieyasu had already been in contact with many of the daimyo in the Western Army for months, promising them land and leniency after the battle should they switch sides. Ieyasu had also secretly communicated with [[Toyotomi Hideyoshi]]'s nephew, [[Kobayakawa Hideaki]]. With a total of 170,000 soldiers facing each other, the Battle of Sekigahara ensued and ended with an overwhelming Tokugawa victory.<ref>Titsingh, Isaac (1834). [Siyun-sai Rin-siyo/[[Hayashi Gahō]], 1652], ''[[Nipon o daï itsi ran]]; ou, [https://books.google.com/books?id=18oNAAAAIAAJ Annales des empereurs du Japon]''. Paris: [[Royal Asiatic Society|Oriental Translation Fund of Great Britain and Ireland]], p. 405.</ref> At the conclusion of the battle, Ieyasu marched to Osaka castle, where [[Mōri Terumoto]], the grand commander of Western army, surrendered to him.<ref>{{harvtxt|Yano Kazutada |1926|pp=590~593}}</ref>

The Western bloc quickly collapsed, and over the next few days Ishida Mitsunari and other western leaders such as [[Konishi Yukinaga]] and [[Ankokuji Ekei]] were captured and executed.<ref>Turnbull, Steven: ''The Samurai: a Military History'' (London, 1977), Osprey Publishing London, pp. 245–246</ref> However, Ieyasu was angry at his son Hidetada, whose army was late to arrive, leading to an unexpectedly long siege against Ueda castle. Sakakibara Yasumasa offered an explanation and testified in defense of Hidetada.<ref name="sakakibaraUeda" /> Meanwhile, Ieyasu pardoned his enemies who defended Ueda castle, including [[Sanada Masayuki]] and [[Sanada Yukimura]], at the behest of Ii Naomasa and [[Sanada Nobuyuki]].{{sfn|野田|2007|p=典拠史料は「真田家武功口上之覚」（『真田家文書』中巻、1982年}}