As the five-year period mentioned by Ashikaga Hiroshi approached, the situation in became noticeably more uneasy. Oda Nobunaga fought a bloody battle before, and finally recaptured the lost half of the land in Owari, but the offensive against Asai Asakura has always been slow, and it can only be fought for by one city, fortunately, Oda Nobunaga occupies the advantage of troops, and finally hit the bottom of Kotani Castle, but for this fortified city, the Oda army has failed to take it down several times, and it seems that it can only be besieged for a long time to fall into the city. But on the other side, Miyoshi Chokei, who had been fighting a tug-of-war with Ishiyama Honganji for many years, suddenly broke through the Ishiyama Imperial Workshop, slaughtered all the masters in the city, and then waved his army north, and the fortress that the Hatano family had held for many years was also quickly conquered by Miyoshi Chokei, which suddenly made Oda Nobunaga feel itchy. After many investigations, Oda Nobunaga learned that Miyoshi Nagakei had bought a weapon called a large barrel from the Nanban, which was an extra-large musket, and it was used to bombard the city gate.

Oda Nobunaga didn't care about such a trivial matter as exploding, anyway, he didn't operate it himself, and he couldn't blow it up himself. So quickly send someone to contact the Nanban people to buy a big tube, but the Nanban people's asking price is black enough, a big tube costs a sky-high price of 5,000 yuan, but at this time it is still a seller's market, love to buy buy or not to buy out! In order to capture Otani Castle as soon as possible, Oda Nobunaga couldn't take care of this, so he spent a lot of money to buy six large cylinders, and hired Nanban people to transport them to the bottom of Otani Castle, and in the brilliant artillery fire, he easily blasted open the gate of Otani Castle that stained the battlefield with the blood of countless Oda family athletes. Then the Oda army rushed in, and that night, Otani Castle was captured, and Asai Ichido committed suicide in the castle tower.

When the news of the fall of Kotani Castle reached Asakura Yoshikage's ears, Asakura Yoshikage's whole person was almost stupid, especially the kind of weapon that could blast open the city gate, this thing couldn't be defended, but the Asakura family currently didn't have the ability to fight a field war with the Oda family, which had an absolute advantage in numbers. Just when he was in a dilemma, Oda Nobunaga once again called on the big barrel to blast open the Kanesaki Fortress, and the gate of Echizen Province was opened!

Frightened, Asakura Yoshikei had to surrender to Oda Nobunaga, but fortunately, under the pressure of Ashikaga Molong Kamiraku, Oda Nobunaga did not dare to use Asakura Yoshikei's skull as a wine cup as in history, and the conditions offered were still relatively favorable: the Asakura family kept 300,000 stone around Ichishiri Valley Castle, and of course there was no need to mention the words of jointly sending troops to resist Ashikaga Molong, it was all necessary.

After leveling the Echichi period, Oda Nobunaga attacked Kaga who was raging in the Tsukozong non-stop, and these masters who took the opportunity of the decline of the Asakura family to do things everywhere were directly pushed by Oda Nobunaga, and the entire Kaga was almost slaughtered by the Oda army, and the game was even more thorough than that of Asakura Sodr.

After tasting the sweetness of the big tube, Oda Nobunaga and Miyoshi Nagakei both bought large quantities of the Nanban people's big tubes, and also tried to imitate them themselves. But how can this thing be so easy to play? It is much more troublesome to build this than to make a musket, and the most important thing is the material, and the smoothness and uniformity of the cannon wall is a difficult problem to solve by manpower. However, fortunately, the two families controlled the most elite areas of the Japanese Kingdom, and they also put together a artillery team of more than 200 large barrels.

Running on the principle of first strike, Oda Nobunaga persuaded Miyoshi Nagakei, and the two families jointly dispatched, mobilized 130,000 soldiers from, and went straight to Owari. After flattening Nagashima Castle with two hundred large gates on the way, the wealthy clans of Ise Province surrendered to Oda Nobunaga, no way, they all knew that they were a few pounds and a few taels, and if they defended the city, they could still fight with Oda Nobunaga, and there must be a strong leader in the field, otherwise it would be a food delivery. The problem is that there is really no way to defend the city with two hundred gates, so you can only kneel.

Oda Nobunaga did not have the leisure to continue to argue with the wealthy clans of Ise Province, directly coerced their main force, and continued to press towards Mikawa Province. At this time, the Oda Miyoshi coalition army had swelled to 150,000 people, such a huge force, even the Mikawa barbarians were numb, but they who had become believers in the sect would not be forgiven by Oda Nobunaga, so they could only resist desperately. However, whether it was defending the city or fighting in the field, they were also no match for Oda Nobunaga, but the incarnation of wild samurai to attack the rear of the army received good results. However, this did not stop the advance of the Oda Miyoshi coalition army at all, and after the fortresses of Mikawa Province were almost all razed to the ground, the coalition forces continued to advance towards Ene Province.

The Imagawa clan also knew about the big tube, and after understanding that this thing was currently impossible to defend at all, he ordered the whole army to shrink the defensive line, and more than 20,000 Imagawa troops took refuge in Kanto directly. Anyway, when the sky falls, there is a Ashikaga Molong on his head, what is he afraid of. Seeing that the Oda Miyoshi coalition army was in a position to take the land of the Three Kingdoms of Tokaido, even Takeda Shingen couldn't sit still, and regardless of Takeda Yoshinobu's death, he immediately raised a large army of 27,000 people and went south to join the Oda Miyoshi coalition army under Urahara Castle. He is not stupid, if he sends troops alone, it seems that Ashikaga Molong will transfer the main force to deal with the Oda Miyoshi coalition army, but he doesn't have a big cylinder in his hand, and the siege speed must still be very slow, so it will not be good to get any benefits, it is better to join the Oda Miyoshi coalition army directly and drink with the mixed soup.

But what puzzled everyone was that the coalition army, which was bound to win all the way and attack all the way, actually stopped under Urahara Castle. It's not that Oda Nobunaga doesn't want to move on, it's that he really can't do it! Ota is not a fool, he has been squatting here for five years, and as one of the core high-level leaders of the Ashikaga family, he knows very well that the Ashikaga army is accumulating cannons to play. From that time on, he knew that the way of war in the future would inevitably change, and after discussing the method of defending the city with the Southern Barbarians and the Ming people, Ota Zizheng, as the top master of city defense, actually played something similar to the European fortress, you must know that at this time, the Italians had just invented the fortress, and it had not yet been popularized in Europe.

Using the traditional city wall to defend the cannon is not to say that it can't be done, but the cost is outrageous, even with the national strength of the Ming and Qing dynasties, it can only build a few key fortresses, the most classic is the Shanhaiguan defense system, even the heavy artillery can withstand to a certain extent. Of course, this also has something to do with the fact that the opponents of the Celestial Empire generally don't know how to play cannons. But Europe is different, so big places are crowded with a bunch of small countries, everyone knows that big things can be heard, and as soon as the cannon is popularized, Europeans have to think about how to improve the defense system of cities. Like the Italians, Ota lowered the walls as low as possible, using moats to form inner moats. This kind of wall can make full use of the topography and soil volume, absorb the kinetic energy of cannonballs, and the low position of the wall greatly improves the defense ability of the corresponding cannons. Outside the trenches, the impact slope is filled with excavated earth, so that the defenders' firepower can best suppress the enemy forces attacking from the wilderness. In order to encircle the attackers, the star-shaped horns protrude beyond the defensive line, thus increasing the angle and length of the shot. From the towering walls to the low moats, although the buildings above the ground behind the walls are exposed, they protect the safety of the fighters above the city walls to the greatest extent, thus improving the city's defense capabilities.

Although there were still disagreements within the Ashikaga family about the effectiveness of this new method of defense, Oda Nobunaga and Miyoshi Nagakei were bumpered by Ota's defense. Originally, this type of defense was mainly aimed at opponents with a large number of artillery, and if they were attacked purely by infantry, they would have received better results, but the problem was that Ota Shimasa had neither muskets nor cannons in his hands. After learning the news of the confluence of Oda Nobunaga and Miyoshi Nagakei, Ashikaga Molong immediately transferred the second-line troops stationed in the Hakone Mountain defense line to support. More than 6,000 muskets and 100 cannons were forged into a steel defense, and no army could withstand such firepower.