From Tohoku to Kyushu, the Battle of Sekigahara was fought not only on September 15, but also in japan. In July and October of the 5th year of Keicho (1600), the two major camps of the East and the West launched a fierce local war throughout Japan. The war that divided Japan in two spread to Tohoku and Kyushu, and there were various local ambitions. Depending on the situation of the local campaign, the war that divided Japan in two may continue, and may even change from victory to defeat.
The Battle of Sekigahara is usually fought on September 15, 1600, in Mino's Sekigahara, between Tokugawa Ieyasu of the Eastern Army and Ishida Mitsunari of the Western Army. But the war did not take place only on that day, in that place. Before and after the Decisive Battle of Sekigahara, the Eastern and Western Armies fought throughout the country.
Speaking of which, the official battle of Sekigahara ended in just one day, which is nothing more than consequentialism. Just as the Rebellion of Onin and Civilization lasted for 11 years, in the Battle of Sekigahara, local wars began before the official war, and continued after the official war.
Second Ueda Battle / 5-8 September of the 5th year of Keicho.5
During the conquest of Aizu, Tokugawa Ieyasu made his son Tokugawa Hidetada the Daimyō of the Tokugawa Clan as a former army march. After Koyama decided to stop attacking Aizu, Tokugawa Ieyasu personally led the rear army centered on the side daimyō west of Tokaido, and ordered the former army led by Tokugawa Hidetada to lead more than 38,000 troops from the west of Higashiyama Province. The main force of the Tokugawa army led by Tokugawa Hidetada was Sanada Masayuki and Sanada Yukimura (Nobuhiro) father and son in Ueda Castle.
Sanada Masayuki's son-in-law, Sanada Nobuyuki (Nobunyuki), joined the Eastern Army because his father-in-law was Honda Tadatsu, one of the Four Heavenly Kings of Tokugawa, while Masayuki and Nobuhiro joined the Western Army. It is said that Sanada Masayuki's main room and 30%'s main room are the daughters of Utarai Tadashi, and if this is true, then the two are consorts (there are many opinions).
Moreover, Sanada Yukimura's main chamber is the daughter of Yoshiji Otani, an ally of Ishida Mitsunari. Before the Sanada family set out on this hill, they had a secret conversation with Inuyasha in Shimono and decided to part ways with their father, son, and brother. Considering the in-laws of the Sanada family, Sanada Masayuki and Sanada Yukimura defected to the Western Army, and Sanada Nobuyuki's defection to the Eastern Army was undoubtedly the established route.
The Sanada army had only 2,500 men and had no chance of winning the field battles
On September 2, Tokugawa Hidetada entered Komoros castle and prepared to attack Ueda Castle. Ueda Castle is located in the middle of Aizu and the upper zone. As long as Ueda Castle followed the Western Army, Aizu and Kamito were easily linked. For the Tokugawa Army, this was a key area to be controlled no matter what.
In contrast, Sanada Masayuki chose to defend Ueda Castle. Sanada Masayuki was said to have mobilized only 2,500 men, and he fought against the Tokugawa Army in the field, with no chance of victory.
On September 3, Sanada Masayuki, who decided to defend the castle, conveyed his intention of surrender to Sanada Nobuyuki, his son who was serving as a member of the Tokugawa side. However, by the fourth day, Sanada Masayuki had not yet opened the castle. It can be seen that Sanada Masayuki had no intention of surrendering from the beginning, and only made a false surrender request just to buy time.
Accordingly, Tokugawa Hidetada ordered the entire army to capture Ueda Castle. On the fifth day of the next day, Tokugawa Hidetada set out from Ogiso Castle and sent Sanada Nobuyuki as the vanguard to attack Toshi Castle. It was Sanada Yukimura who was supposed to be in charge of Toshi Castle, but Sanada Yukimura was reluctant to engage his brother and abandoned the castle before the battle and withdrew to Ueda Castle. Although there is also a saying that his brother Sanada Nobuyuki was able to make a meritorious contribution, the possibility of giving up in order to avoid dispersing forces is high.
Tokugawa Fang, who had captured Toshi Castle, set up a main line at a dyeing booth 2 kilometers east of Ueda Castle. In this way, the Tokugawa army issued an order for a general attack on September 6, which was approaching Ueda Castle. The Tokugawa army launched a general attack on Ueda Castle, but Ueda Castle was known for its fortifications, and even if it relied on force to attack, the sacrifices would increase. So the Tokugawa Army ordered the harvesting of rice under Ueda Castle. In order to stop the attack of the Sanada army, they adopted the strategy of attacking the Sanada army.
As the Tokugawa Army had thought, 200 men of the Sanada Army attacked from the city in an attempt to stop the Tokugawa side from moving. A detachment of the Tokugawa Army received orders to attack the Sanada Army, forcing them onto the city walls. But this seems to be Sanada Masayuki's plan. As soon as the Tokugawa army approached the city wall, the Sanada army would fire with bows and arrows and iron cannons, making it impossible for the Tokugawa army to get closer. In this case, Sanada Masayuki ordered the city gates to be opened, and Sanada Yukimura led an army to approach Tokugawa Hidetada's camp. At this time, Tokugawa Hidetada's Seven Horses of Kitamoto defended the Sanada Army and was praised as "Ueda's Seven Guns".
At first, Tokugawa Ieyasu ordered Tokugawa Hidetada to pacify Shinano. Therefore, it was planned to attack Ueda Castle, the stronghold of the Western Army in Shinano. However, after the fall of Gifu Castle on August 23, the situation changed. Because Tokugawa Ieyasu himself set off from Edo Castle to the upper part. On August 29, Tokugawa Ieyasu sent Okubo Tadaoyoshi as an emissary to Tokugawa Hidetada, hoping that he would deploy in Mino on September 9. However, due to the surge in the River tonkawa, when Okubo Tadaomi arrived at the Tokugawa Hidetada Honjin in Kozo castle, it was september 8, nine days later.
On the ninth day, Tokugawa Hidetada temporarily withdrew his entire army to Kozō Castle, and the next day, he led the main force to Mino, but due to heavy rain and muddy roads, the march took a lot of time. By the time of the Battle of Sekigahara, the war was over, and it is said that Tokugawa Hidetada had offended Tokugawa Ieyasu's anti-scales.