When Jiang Jianwu arrived at the headquarters, "Sun Yuesi finished lunch. Tactics are being plotted on the map with a little one.

"Huwu, you came just in time, I was about to send someone to find you, just now the air force came with information, the Japanese army in the direction of Yiju is suspicious, maybe it will soon attack the national border, you immediately go back to arrange a level, and urge the officers and soldiers to step up the construction of fortifications."

Seeing Jiang Huwu coming, Sun Yue hurriedly called him to the side of the map, "Ding asked a few words, and then asked about the origin of the officers waiting outside the door, asked about the situation, and called the trainee officers into the room, and said something official. Then he called a staff officer and beat them to the troops.

The trainee officer left the headquarters with his feet on the net, and Zhang Guoping walked into the headquarters on his hind feet, exchanged a few words with Sun Yue, and urged Jiang Lingwu to lead him to the position to have a look.

When Jiang Xie Wu and Zhang Guoping rushed to the position. The officers and men have already begun their work, and now the trenches and anti-artillery bunkers have been almost dug up. All that remains is to lay barbed wire in front of the positions, as well as to lay mines.

Zhang Guoping was very satisfied with the construction of the position. After inspecting the position, he did not rush to leave, but stood on the bank of the Ji River. Hold a telescope and look southeast.

This is where the river flows into the Yalu River. Zhang Guoping was waiting, waiting for a fleet to come.

At two o'clock in the afternoon, the flotilla finally came, starting with the gunboat "Chuguan" and followed by several torpedo boats, which were the "wild duck troops" swimming on the Yalu River.

"Mallard troops. The purpose of withdrawing from the Yalu River to the Grade River was to provide fire support to the defending troops, and the water of the Grade River was shallow, and the large Japanese warships could not enter, but it was a shallow gunboat like the "Chuguan" that could wield firepower and enter the Grade River. It was possible to avoid direct contact with the Japanese army, which was conducive to preserving strength, and once the mines were laid at the mouth of the Kihe River, the Japanese Navy could not send gunboats to the Kihe River. Zhang Guoping saw through the telescope that the ships of the "Wild Duck Force" were sailing towards Zhenjiang Fort, so he breathed a long sigh of relief, originally he was worried that the fleet might be intercepted by Japanese artillery fire on the Yalu River, but now it seems that the strength of the fleet has not been damaged, especially the gunboat "Chuguan", such a shallow gunboat cannot confront large warships head-on. However, in a shallow water theater such as the Jihe River, it can wield sufficient combat power to provide powerful fire support for the army units.

The main reason why the defense line of the Yalu River did not spread along the line of the Yalu River, but retreated for dozens of miles, was that it was worried that the Japanese Navy would sail into the Yalu River to provide artillery support for the Japanese army and establish a position far away from the Yalu River. In order to fully exert its own firepower and weaken the enemy's firepower, the General Staff Headquarters chose the area for building fortifications in the lower reaches of the Ji River, far away from the Yalu River. I am stepping out of this consideration.

Compared to naval heavy artillery, army heavy artillery is difficult to move. And Gu is vulnerable to air force strikes. Unless the Japanese army can seize air supremacy, otherwise. This line of defense was an insurmountable obstacle for the Japanese ground forces.

Of course, Zhang Guoping was not without worries, if the Japanese army was too strong. It is still difficult to hold this defensive line, because so far the total strength of the Chinese side on this Yalu River defense line is less than 20,000, and half of the troops are Revolutionary Guards or local troops. The combat effectiveness is relatively poor, and as for the independent cavalry division under Zhang Guoping, its main force has been transferred to Phoenix City to prepare for the decisive battle on the Liaodong Peninsula. Now there is only one person that Zhang Guoping can directly command, the cavalry regiment, and a small number of Zhang Zuoshuang's cavalry, and the rest is only the infantry unit.

It is precisely for this reason that Zhang Guoping is very happy about the arrival of the "Wild Duck Force", although the strength of this naval detachment is weak, but as long as it enters the Grade River, then this force can play a heavy role, because the defense line of the Yalu River is distributed on both sides of the Ji River, relying on this water route "Wild Duck Force." It is very convenient to provide fire support for most positions on the defensive line. This is a mobile battery on the water.

Of course, "Mallard troops." The heavy firepower is still insufficient. Zhang Guoping has already applied to the General Staff Headquarters to transfer two more trains of artillery from the direction of the Liaodong battlefield to at least hold the southern part of the national defense line, as long as any key position on the national defense line is not lost. Even if the Japanese overcame the defensive line, they could not continue to advance, because their logistics line was exposed in front of the sortie positions of the squadron.

It is not enough to rely on train artillery alone, heavy howitzers must also be replenished to the front-line troops as much as possible, and the number of bombers in the air force must also be strengthened, but a decisive battle is currently brewing on the Liaodong battlefield, and how many weapons and troops can the General Staff add to the Yalu River front, Zhang Guoping really does not have much bottom in his heart, he can only try to do his own job well, at least arrange the position first.

Zhang Guoping called a staff officer, stood on the river bank, signaled to the "wild duck troops", and waited for "Chu Guan." When the ship sailed to this side, it stopped on the river to throw cobalt, put down a single board, and carried the captain and others ashore. I got in touch with Zhang Guoping. From this moment on, the "Wild Duck Troops" went straight to the Wulu River Theater and were directly directed by Zhang Guoping.

It was not the second time that Jiang Xie Wu had seen the warships of the "Wild Duck Troops", in fact, when the Daejeon troops retreated from the Yalu River and crossed the river a few days ago. It was the "Chuguan" that provided fire cover for the troops on the river, and it was precisely because of the existence of this naval detachment that the Japanese army units did not cross the Yalu River for a long time, and only launched a few tentative attacks on a certain scale. It retracted to the left bank of the Yalu River.

After the captain of the "Chuguan" got in touch with Zhang Guoping, he followed Zhang Guoping to the Zhenjiang Fort Headquarters, but Jiang Huwu stayed in the position and continued to command the troops to arrange the position, because the front is the river, the position of the position is very similar to the north city of Anzhou, Jiang Lingwu can completely optimize the position according to experience, and absorb the Anzhou defensive war teachings, Jiang Keywu deliberately laid mines on the river beach on the opposite bank, and equipped the position with searchlights, once the Japanese army attacked at night. The troops would be able to effectively project fire and suppress the Japanese on the beachhead.

By the time the sun was in the west, the barbed wire fence in front of the position had been laid out. However, Jiang Lingwu did not ask the troops to stop the construction immediately, but urged the officers and soldiers to continue to strengthen the trenches and build more anti-artillery bunkers.

Just when Jiang Lingwu's order was conveyed. A reconnaissance plane of the Chinese Air Force flew over from the direction of the Yalu River and skimmed over the Zhenjiang Fort position at a low altitude, which immediately aroused the interest of the officers and men. Many people cheered and jumped on the position, waving engineering tools in their hands, and signaling to the plane.

Jiang Jianwu also raised his head and looked at the plane. You can see the pilot and the machine gunner, the pilot is driving the plane in a serious manner, but the idle machine gunner who has nothing to do raises his right hand and greets the officers and soldiers on the ground.

Jiang Xie Wu smiled, in his opinion, in the Battle of Anzhou, China's air force units performed well, held out to the last moment of the battle, if it were not for the air force's hard work, Anzhou would not have held out for so many days, and it was the lack of fuel and ammunition of the air force units that eventually led to the overall superiority of the Japanese artillery fire.

Now that a field airfield has been built in Tuchengzi in the north, and the logistical supply is sufficient, it is conceivable that once the Japanese army crosses the Yalu River and launches an attack, the Chinese air force will once again show its housekeeping skills.

Of course, Jiang Huwu did not know that this air force reconnaissance plane had brought an important piece of information to the Yalu River Theater, and this information had directly prompted the General Staff Headquarters to adjust its combat plan.

This information was fed back to the Zhenjiang Fort Headquarters by the General Staff that night, and subsequently. Deputy Commander Sun Yue immediately conveyed the order, and all the troops were transferred to the first level of combat readiness

The reason is very simple, because in the waters of Dadonggou southeast of the mouth of the Yalu River, the air force's reconnaissance planes showed traces of the Japanese Combined Fleet. In addition to the main force of the Japanese Combined Fleet, the pilots of the reconnaissance planes also showed a large number of Japanese merchant ships and freighters, and all kinds of signs indicated that the Japanese troops were about to lead a landing operation at Daidonggou. Some Japanese warships have already entered the mouth of the Yalu River and are heading up the river against the current, and the battle of the Yalu River is about to begin.

While the defenders of Zhenjiang Fort were grinding their fists, at the mouth of the Yalu River, in the Dadonggou sea area densely covered with shoals and reefs, a huge fleet was landing in the night.

The Japanese Navy Marshal Heihachiro Togo commanded the landing, and at this moment, he was sitting on the flagship battleship "Hanoi", standing on the open bridge in the night, looking out with a telescope in the direction of the Great Eastern Valley.

For Togo Heihachiro, the Great East Ditch is not a strange place, back then, it was here, the Qing Dynasty's Beiyang Naval Division and the Japanese Combined Fleet broke out a large-scale naval battle, and at that time, Togo Heihachiro served as the captain of the "Wave" protective cruiser with the rank of Navy Bossa, and participated in that naval battle, and it was in that naval battle that Togo Heihachiro really saw the power of the ironclad ship, and it was through that naval battle that Togo Heihachiro really became a fanatical believer in the "big ship and giant artillery doctrine".

At that time, the Qing Dynasty's naval fleet was dominated by two ironclad ships, "Zhenyuan Dingyuan". The ship's guns were large in caliber and thick in armor, and in the Battle of Dadonggou, the Japanese combined ships thought that they had suffered a lot, and in the whole naval battle, although the two ironclad ships were attacked by the concentrated fire of the Japanese warships and their hulls were scarred, they never sank. This gave the Japanese Navy a strong stimulus, and since then. The direction of the Japanese Navy's exhibition is "big ships and big guns"

At present, the battleships and battle cruiser fleets of the Japanese Navy are enough to be proud of the Far East, while the strength of the surface ship forces of the Chinese Navy is still weak, but it is the submarine forces that have caused great trouble to the Japanese fleet.

It was in this Sino-Japanese war that the submarine first showed its distinctive tactical principles.