Compared with the Annan militia regiment, which is good at fighting field battles, the infantry battalion transferred from the base camp this time is more adept at positional offensive and defensive warfare on the frontal battlefield. And the tactics of positional warfare using firearms as the main weapon, Haihan can be the only one in the world, and if he wants to recognize himself as second, then no one really dares to fight for this first.

After the previous engagement with the Dutch, the General Staff also reflected on and modified the previous tactics. One of the obvious problems with the tactics of that time was to turn the direction of fire output towards the sea in an attempt to prevent the enemy from carrying out a landing operation. However, this tactic did not work completely, and although it did deal a certain blow to the Dutch armed sailing ships, it was impossible to prevent the forced landing of the opposing fleet by relying only on a dozen shore defense guns. After that, the battery, which lacked infantry cover, immediately became the target of the enemy's siege, but the Haihan side failed to effectively kill the landing enemy at this critical stage.

Having learned the lessons of the previous occasion and taking into account the local geography of Ambuna Island, the General Staff developed a new operational plan for the island-defending forces, aiming the fire on the beach, rather than at sea.

The main purpose of this combat plan is to carry out concentrated strikes at the stage of the enemy's landing and effectively kill and damage its fighters. An unobstructed beach, the opponent has no cover to conceal, and can only act as a live target in the face of dense gunfire fire. Compared with naval warfare, which can only be effective by coastal defense artillery, this method can allow more infantry to achieve firepower output, and the killing effect against the enemy will also be stronger.

In order to drag the enemy landers to the coast, Roger planned to build dense coastal fortifications in a suitable place near the harbor, using criss-crossing barbed wire interspersed with trenches, bamboo stick pits, horse rejections, deer barricades, and other means, and set this barrier zone to a depth of at least 50 meters, completely turning the port area more than one mile wide into a dead zone where it was difficult to move an inch.

Before setting off for the south, Roger and his staff had already built a simplified version of the obstacle strip at the army training base on the Luhuitou Peninsula in Shengli Harbor, and personally led the troops to conduct a landing simulation exercise. It has been proven that even a traverser officer with advanced military experience can hardly quickly traverse this complex obstacle zone in a hurry. If you want to pass the obstacle area by manpower alone, then you have to go to 10101010, m.□.c≯omstyle_tt; More than 20 rounds of rifles are set on fire and unharmed.

Even if someone with a fateful life is able to get through the death barrier of Guò, they will have to face a three-meter-wide trench when they reach the end. The trench was not too deep, more than two feet and three feet, but it was full of dense silt, and it was difficult to pull out the legs if you stepped on it. In order to prevent the high temperature in summer from causing the water to evaporate too quickly and make it hard, live water is also introduced regularly to maintain the viscosity.

On the other side of the silt trench is the main fire output zone, a line of defense divided into three layers: upper, middle and lower. Each line of defense was covered by a one-metre-thick breastwall made of earth, which protected it from land attacks from enemy naval guns. The three echeloned fire output lines will also form a three-dimensional fire network to maximize the damage of enemy infantry trying to pass through the Guò obstacle area.

A similar design was first used in the outer fortifications of Fort Shengli, but Fort Shengli had never encountered foreign invasions, and the experience of Haihan's foreign operations was mostly offensive, and there was rarely passive defense, so the effectiveness of this three-dimensional fortification has not been really tested in actual combat. However, it is clear that the defense line of the combined infantry and artillery must have far surpassed the previous single battery defense in terms of reliability, and the military top brass also had high hopes for its actual combat performance.

However, the biggest challenge at present is not to find an effective way to defend and fight, but to complete the construction of these fortifications in a limited time. Although the base camp transferred special engineering personnel to direct the construction, because it was not known when the Dutch would make a comeback again, the construction period was also set very tightly, and the ban period for the Dutch was until December, but the actual construction period was required to be completed within October.

The Dutch were also unaware of the fact that the Haihan had already begun to make their next move on the island, and Van Longen and the others still had a glimmer of hope that they could use diplomatic means to stop them from acting in the eyes of no one before the Haihan took military action.

After safely leaving the waters of the Natuna Islands, the Dutch did not need other ports to dock for supplies on the way, partly because of the urgency of time, and secondly, the Champa states in the southern part of Indochina also had close contacts with the Haihan people, and had never been friendly to the East India Company. So Van Longen decided to fly directly to Sanya in order to shorten the sailing time as much as possible. During his passage through the waters of Annam, Van Longen even specially ordered the fleet to keep a distance of more than 20 nautical miles from the coastline, so as not to encounter the ships of Haihan in this sea area and expose their tracks prematurely.

After thirty days of departure from Batavia, Van Longen's fleet finally reached the southern tip of Qiongzhou Island, about forty or fifty nautical miles from the port of Sanya. It was late in the evening, and Van Longen summoned Van de Wegen and Sukeyi to the captain's room and showed them the charts of the route.

"Gentlemen, if there is no major error in our course, we will arrive at the port of Sanya tomorrow at the earliest. I hope you can have a good rest tonight and face the Haihan people in the best mental state tomorrow. Van Longen thought for a moment and added, "This may be the best time for the three of us to make a meritorious service, and I think both of us should value this opportunity as much as I do, right?"

"Of course, Mr. Van Longen, I agree with your law. Van der Wegen formed a friendship with Van de Velgen on his way back to Batavia from Dayuan Port, and this time Cohen was able to give them the opportunity to make a comeback, and Van der Wegen was determined to assist Van de Longen in his impressive success.

"I heard that the Haihan people have armed patrol boats in the sea near Sanya, and we may meet them tomorrow. Mr. Captain, please remember to remind your crew to exercise restraint and not to misfire the guns and cannons because of nervousness, otherwise we may lose all our efforts. Su Keyi reminded.

"Of course, I will warn them in advance. Van Longen's face also became stern: "I just hope they don't open fire as soon as they see us." ”

With the war in Fujian and the successive statements made by Haihan fully express their stance towards the East India Company, that is, it absolutely has nothing to do with the word "friendly". If a Dutch sailing ship appeared in the waters of Sanya, it is indeed difficult to imagine how the Haihan people would react.

As Su Keyi had predicted, they were discovered early the next morning by Haihan ships operating in the open sea. The first to spot them was not a naval warship, but a merchant ship that was originally intended to go to Da Nang. However, three hours after the ship sailed out of Victory Harbor, it spotted the two Dutch galleons flying the East India Company's VOC flag, and immediately turned around and ran back.

After the battle of Fujian, the news of the destruction of the Hongmao fleet by the militia navy had already been publicized in the Haihan ruled area through various channels, and the ordinary people also knew that their army had fought a big battle with the Hongmao people in Fujian, and there were hundreds of Hongmao prisoners escorted back from Fujian alone, and the seized weapons, military uniforms, flags and other trophies were displayed on the square outside the Shengli Fort for ten days. Therefore, as soon as the captain of the merchant ship saw the Dutch sailing ship, he recognized them from the flag flying on the mast from a long distance.

The merchant ship was not carrying much cargo, so it was able to get ahead of the Dutch sailing ship, and when it was about ten nautical miles from the port of Victory, it was met by two naval vessels that had gone out to sea for training. The captain of the ship immediately ordered someone to raise a red and blue distress flag, approached the naval ship, and immediately reported what he had seen in the open sea.

Although the two sailing vessels attached to the Navy were training vessels, they were also fully armed and ready for combat if necessary. The officer who led the team immediately ordered the merchant ship to return to port immediately to call the police, and he led two training ships to the open sea to intercept the Dutch sailing ship with unknown intentions.

About half an hour later, the ships of both sides met on the sea. The Haihan officer ordered the cannon to be fired into the sky as a warning.

"That's the warship of the Haihan people. These ships fought in Fujian, and I recognize their shape. Van der Wegen confirmed the other man's identity through the monocular, and then handed the telescope to Van Longen next to him.

"This ship doesn't look as big as our armed sailing ship!" Van Longen expressed doubts that Van der Wegen would lose to such a ship with an advantage in numbers and tonnage.

"No, they have at least two ships of greater tonnage, one of which has only been seen by the pirates of Eighteen Zhi, according to ......," Van der Wegen said, looking at the sailing ship he was on, in a tone of uncertainty "It is more than twice as large as our ship, with numerous guns, and a super-fast ship, as if some monster was pushing it underwater." ”

"Those pirates were beaten stupid by the Haihan people!" Fan Longen didn't believe in his partner's method, he knew that the Ming people liked to spread all kinds of strange things the most, and the more they spread it, the more mysterious it became, and it was often 108,000 miles away from the truth in the back, and the rumors that Van Dewegen heard didn't know how many times it was, and the credibility was not high.

"There are indeed a lot of incredible rumors about the Haihan people, and I have heard those Ming merchants talk about it many times when I was in Batavia. Su Keyi looked at the two Haihan warships rushing towards him, and couldn't help but remind: "Mr. Captain, I think it's best for us to lower the sails now to show our intentions." ”

Van Longen glared at Su Keyi, he didn't like to have such a Chinese in his team to point fingers, but this arrangement was made by Governor Cohen, and he had no right to change it. What's more, he didn't know what secret mission Cohen had assigned to Su Keyi, and it was possible that he was in charge of spying on himself and Vanderwegen during this trip, and reported to him when he returned. Therefore, although Fan Longen is a little dissatisfied with Su Keyi's existence, he will not express it in his words.

"Lowering the sails!" Van Longen also knew that this matter could not be delayed, and if he was slow, the people on the other side of the ship might mistakenly think that he was planning to break into Shengli Harbor, and when the time came, he would directly fire at this side, and the matter would not be easy to clean up.

The two Dutch sailing boats chose to lower their sails and slow down when they were still less than two nautical miles away, which really made the Haihan crew on the opposite side a little relieved. However, according to the standard operating procedures, the officers on the Haihan training ship still ordered the crew to be on standby, and the few guns of the ship were unloaded early and loaded with ammunition and aimed at the two Dutch sailing ships. After entering a relatively close distance, the crew took out their tin horns and began to shout, ordering the crew of the Dutch sailing ship to assemble on deck at once to be boarded and inspected.

"It's a great humiliation!"

Van Longen's fists were clenched tightly, his face was pale, and Van Dewegen next to him was also unhappy. Just now, Su Keyi informed them of the content of the other party's shout, which was indeed a difficult situation for the proud Dutch officer to come. If it weren't for the mission, Van Longen really wanted to order the whole crew to take up arms and fight the other side.

Van Longen shouted three times before he gave the order for the crew to stop the operation and all of them to gather on deck. If he hesitated for a few more minutes, the Haihan officer, who was already about to lose patience, might really have ordered to open fire and bombard first.

As one of the Haihan sailboats approached, the crew stretched out a hook tied to the end of a bamboo pole and hooked the side of the Dutch sailing boat, slowly closing the distance. Then several armed soldiers jumped onto the Dutch ship on the side of the ship, and Su Keyi hurriedly stepped forward to identify himself and his intention.

"Mission?" The officer in the lead looked at Su Keyi and Van Longen and Van der Wegen behind him, still a little hesitant. He had never seen the Dutch, nor had he encountered such a foreign mission visiting Sanya, and then asked, "Do you have identification?"

"Yes, yes!" Su Keyi replied repeatedly, "We have a letter from the Governor of the East India Company to prove it. ”

The officer took it and looked at it, but he didn't understand the text on it, so he had to return it to Su Keyi: "You wait, I'll ask for instructions first." ”

The officer returned to the training ship to ask for instructions, but the leader of the team was also a naturalized civilian officer, who was also inexperienced in dealing with such affairs, so he could only order the arms on the other side of the ship to be collected first, and dozens of soldiers were sent to the other side's two ships to monitor and then go back.