Although Matsudaira Yasumoto personally came to discuss the surrender, Katakura Keisuna did not show too much surprise, in his eyes, the head of the Hisamatsu Matsudaira clan was at best just a retainer of the Tokugawa clan, and now he was bent down to surrender, and he had already given enough face to talk to him, and he was not qualified to bargain directly with Date Masamune and other daimyos.

Although Matsudaira Yasumoto has mediocre ability, he has followed Ieyasu for so many years and has learned something in judging the situation. In the process of talking with Katakura Jingzuna, he did not use words such as "the fish is dead and the net is broken" and "the last battle to fight against the water" to express his attitude to fight for more bargaining chips, but at the same time he is neither humble nor arrogant, his tone is as easy-going and humble as possible, intending to win Katakura Jingzuna's sympathy.

This trick was indeed useful, Katakura Keixuna was very satisfied with Matsudaira Yasumoto's attitude, and under Yasumoto's repeated requests, he was willing to introduce him to Date Masamune, who would decide on the disposition of Sannomaru's army.

Hearing that the Tokugawa army of Sannomaru was willing to surrender, Date Masamune, who had been worried about being robbed of the first credit by other daimyos, temporarily put his hanging heart down, and when he met with Matsudaira Yasumoto, he comforted him and promised him that after the war, he would intercede for the Kumatsu Matsudaira clan in front of Hideho.

Matsudaira Yasumoto was also relieved to receive Date Masamune's promise, and he thanked Masamune on behalf of a sergeant in the castle, and after receiving Masamune's confirmation letter, he immediately went to Takebashi Gate, and in front of Katakura Keitsuna and the Tohoku Coalition Army, asked the Tokugawa army guarding the gate to give up resistance, and this order was also conveyed to the Tokugawa army in Pinghemon.

At about 4:30 p.m., Matsudaira Yasumoto led the remaining 500 or so people to retreat outside Edo Castle through the Hirato Bridge, while he himself went to Oteto to meet Ogasawara Tadakiyo in accordance with Date Masamune's instructions. Date Masamune's meaning is obvious, I can take the first credit for conquering Sannomaru, but the face of the right house must also be taken into account. Although Matsudaira Yasumoto surrendered to the Northeast Coalition Army, the Toyotomi Army was the protagonist of this battle, and in order to avoid unnecessary trouble, and at the same time to explore the tone of Ogasawara Tadashiyo, it was very necessary for Matsudaira Yasumoto to go.

When Tokugawa Hidetada in Honmaru learned of Matsudaira Yasumoto's surrender, he was first furious, then frightened, and in a panic, he ordered Ina Tadaji to lead his troops to attack and do his best to drive the Tohoku coalition forces out of Sannomaru. When the Sakai brothers, who went out on patrol, learned about it, they hurriedly returned to the Honmaru Palace and advised Hidetada: "The two gates of Sannomaru have been broken, and there is no power to return to the sky. The only way to do this is to withdraw the remnants of Sannomaru to Honmaru in order to preserve their strength and avoid being broken by the enemy one by one. ”

The order to let Ina Tadaji send troops was originally made by Tokugawa Hidetada in a panic, and when he heard the analysis of the Sakai brothers, he suddenly realized that he sent someone to Shimojobashi to stop the troops and ordered Ina Tadaji to lead his troops to withdraw into Honmaru.

However, it was too late, and due to the suddenness of the incident and the fact that Ogasawara Tadakiyo had deployed his men and horses to storm Otemon to disperse the Tokugawa army, Ina Tadaji's army was only 1,200 men, and they met the swarming Tohoku coalition forces before they reached the Hirakawa Gate. Facing the Northeast Coalition Army, which was more than ten times his own strength, Ina Tadaji was also a little surprised, he didn't expect the enemy army to advance so quickly.

In fact, this all depended on the guidance of several Hisamatsu Matsudaira clan troops in the Northeast Coalition Army, under their guidance, the coalition army captured the Sannomaru Palace as quickly as possible, and joined forces with another coalition army in the area of Pinghemon, thus quickly controlling more than half of the area of Sannomaru, and finally met the Tokugawa army led by Ina Tadaji in the open area between Oteemon and Hepagawamon.

"Woohoo!" With a volley of iron cannons, the Tokugawa troops who rushed to the front fell to the ground, and this is the power of the "horse cannon" that Date Masamune was proud of. However, it should be noted that although the "riding iron" has a certain deterrent effect, the gimmick is greater than the actual combat effect, especially compared with the "early entry" and "three-stage strike", it has reduced the speed, accuracy and continuity, which means that the existence of this branch of the army has a deterrent effect far greater than the actual combat.

I have to say that although the lethality of the "riding iron" is not too strong, but for the Tokugawa army, whose morale is already depressed, it has played a great deterrent, and before the head-to-head confrontation, many soldiers left the team and fled around, Ina Tadaji is both helpless and sad, when the Tokugawa family was powerful and dared to fight against Hideyoshi, now it has fallen into such a field? Fleeing, descending, the young master is still hiding in this pill and does not dare to come forward to boost morale, is it really powerless to return to the sky? As an old minister of the Tokugawa clan, although he was unwilling in his heart, he still carried out Tokugawa Hidetada's orders head-on, and decided to defend the honor of the Tokugawa clan once again with his life.

The Tokugawa Commander led the remaining cavalry into the 10,000-strong formation of the Northeast Coalition Army like a sharp arrow, posing a great threat to the Coalition Army's forward, and the Tokugawa clan's Ashigaru also joined the battle, and for a while, the offensive momentum of the Northeast Coalition Army was slightly contained.

However, this containment was achieved by the spirit of Sergeant Sannomaru Tokugawa who was not afraid of life and death and the lives of each other, and the situation was quickly reversed without reinforcements. After the cavalry was killed and wounded, Ina Tadaji, the spiritual pillar of the Tokugawa army, was also picked under the horse by several samurai of the Date family after three assaults. The head of this general was cut off by the samurai to invite merit, and Gu Zu also disappeared after the war, and the "Hanzaemon", which used to be famous in the Kanto region, has now ended up like this, which can be regarded as a microcosm of the current situation of the Tokugawa clan.

When Tokugawa Hidetada's envoy arrived at Shimojobashi, he learned that Ina Tadaji had been killed in battle, and in regret, he immediately demanded that the Tokugawa troops of Uchisakurada Gate and Otemon withdraw to Honmaru. But at this time, the Northeast Coalition Army had already broken through several fragile defensive lines arranged by Ina Tadaji like a flood of fierce beasts, and the troops were divided into three routes, killing at the two city gates and the lower bridge.

With the cooperation of the Toyotomi army, the Otemon Gate and the Uchi-Sakurada Gate were breached almost simultaneously, and the Tokugawa army defending the castle was completely annihilated, and a small number of sergeants who had been routed from elsewhere encountered the Tohoku coalition forces in the area of Shimojobashi, and were slashed and killed before they could retreat into Honmaru. In the end, only more than 100 people in the entire Sannomaru were fortunate enough to retreat into Honmaru, excluding the more than 500 troops of the Hisamatsu Matsudaira clan, the Tokugawa army killed in the battle reached 3,300 people, while the Toyotomi coalition army lost only 700 people.

Perhaps not wanting a repeat of the tragedy of Sannomaru, or perhaps the fall of Sannomaru made Nishimaru's defense meaningless, Tokugawa Hidetada ordered Matsudaira Tadashi to retreat to Honmaru with the remaining 1,300 men before dark, surrendering Nishimaru to Asano Nagamasa.

At this point, the siege of Edo came to an end, and Tokugawa Hidetada relied on Honmaru, Ninomaru and more than 13,000 men to continue to defend it, while the Toyotomi coalition army also achieved the set goal, and turned to the method of artillery deterrence, forcing the Tokugawa Gate in the city to minimize casualties. At this time, it was already May 8, and this day was also a special day for Tokugawa Ieyasu, who was far away in Ueno.