After Toyotomi Hideyoshi's death, Tokugawa Ieyasu acted arbitrarily, suppressed other bosses and tried to seize the world laid by Toyotomi Hideyoshi. After Maeda's death, Maeda * * * admitted defeat and obediently submitted to the Tokugawa family. Although Fukuda Xiu was adopted by Toyotomi Hideyoshi, because of her young age and junior qualifications, she could not quell the factional struggle within the family, which led to her weakened power and was not enough to fight against Konka. Therefore, Konka pointed the finger at Uesugi Kagekatsu. Ishida Mitsunari couldn't bear it any longer. He called on the governors of the world, especially those of Chen Feng, to rise up against Tokugawa Ieyasu, and the famous battle of Guan Yuan broke out.
At the beginning of the battle, Tokugawa Ieyasu's army was not dominant, but after a long battle, Gu Yisi of Uesugi Kagekatsu and the western army were not familiar with it, and their tactics were different. The shortcomings of having to fight alone were exposed, and the Tokugawa army gradually gained the upper hand. Kobayakawa Hideaki, the general of the marked army, saw that it was unlikely that the marked army would win, so he decided to lead his troops to revolt and attack Gu Yisi's army at the front. Yoshiko Tani was caught between Scylla and Charybdis, and was soon defeated, and Otani cut himself. Taking the Kobayakawa Hideaki Rebellion as an opportunity, the Tokugawa Army won a great victory, and the battle of Guanyuan came to an end.
From this battle, we can also see the shortcomings of Ishida Mitsunari, and we can also see that the Toyotomi family's rule has been unable to maintain real Japanese rule for a long time, which indicates the real arrival of the shogunate. Among them, the battle of Guanyuan was the most important battle for Tokugawa Ieyasu to win the Japanese army. It can also be said that the battle of Guanyuan is the core battle of Osaka.