What Zhao Xin hopes is to go to the ocean, at present, the Northern Song Dynasty is ready to make a move against the Liao State, and even to a certain extent, the Sixteen Prefectures of Youyun can be taken down, even if Zhao Xin goes around from the sea to the land, the Shandong Peninsula is impossible, and the Liaodong Peninsula is also difficult, too close.

It is possible to make a detour from the Strait of Japan, to Sakhalin Island, and to the northeast.

In the whole of East Asia, the higher the latitude, the more barbaric the nomads, their individual combat effectiveness is very strong, just like the Jin State that later replaced the Liao State, they chose to find the birth of the Jurchen between the white mountains and black waters under the premise of receiving a huge blow, and gradually became their own soldiers.

Zhao Xin did this, it can be regarded as solving the threat of the north once and for all, with the ocean-going fleet, with cotton, plus thermal weapons, the barbarian nomads in the north have no threat to Zhao Xin at all.

The rise of Mongolia and Jin, at the beginning, could not threaten the Northern Song Dynasty, and was suppressed by the Liao State for many years.

In this era, the Liao State is still the most powerful country in the entire north, and the Tielin Army is still a powerful force that overwhelms the entire steppe, replacing the Liao Jurchens in the future, and the powerful Mongols in the Quartet, at this time, it is only a slightly stronger tribe in the north.

The Jurchens are still in Changbai Mountain, living a slash-and-burn life, their entire tribe, I'm afraid there are not a few qualified long knives, Mongolia is similar, why Mongolia will develop to light cavalry, is because Mongolian horses, really suitable for the strategy of light cavalry, but on the other hand, how can it not be that there are not enough iron weapons.

The reason why the historical feudal kingdom did not think of this is that the Sea of Japan, as well as the seas further north, are not the same as the Pacific Ocean, and the winds and waves are strong, and it is difficult for Chinese-style sailing ships to reach there.

In the same way, the cold in the high latitudes, that is not something they can bear, without cotton, without such a warm weapon as eiderdown, even the northern prairie is enough to bury all the armies, let alone the tundra further north.

Zhao Xin, such a traverser, not only brought a lot of sharp weapons, but also brought a higher strategy, taking advantage of the lack of strength of the northern nomads, to destroy these threats, this is really a good way.

The rise and fall of the northern nomads, the rise and fall of one nation, there will be the rise of other nomads, but this rise takes time.

The northern grasslands, the tundra, for the feudal dynasty, are chicken, there is not much output, but the environment is very harsh, hundreds of kilometers, even thousands of kilometers, there are many people who do not have a person.

However, now that the Dinghai Navy has mastered the ability to initially develop the tundra, it is very difficult to be stationed under the premise that the distance is long and all kinds of materials are not very necessary.

When the railways were connected, cotton was widespread, and there was a lot of food support, the development of the north was not difficult.

The Great Northern Wilderness, after the liberation of China, became the Great Northern Warehouse, even if there is only one season of grain, it is enough to feed tens of millions of people in the Northeast, not to mention, how many mineral deposits are contained in the Northeast that has never been developed.

It is true that China has a lot of land and resources, but there are really not many world-class mineral deposits, but several of them are distributed in the Northeast.

At present, even the sea ships are just starting, let alone the navy, and it is impossible to mention the capture of the north and the development of mining in the northeast.

Sun Ji is now quite convinced of Zhao Xin, who has turned decay into magic, and Zhao Xin's actual ability has developed the Dinghai Navy to the point where it is today, which is not a simple ability.

These pirates, in his opinion, are very poor, not to mention meeting the standards of soldiers, not even the standards of militias, but he still recruits according to Zhao Xin's requirements.

For Zhao'an, Sun Ji did not discriminate much, and even for the northwest, the northwest was barren and could mobilize the forces of the past, and there were relatively few of them, so a group of alien warriors were recruited, and under him, there were also alien warriors.

Zhao'an is a very simple thing, for those rebel armies, peasant armies, when there is no way to directly kill, or deal with it, they will choose Zhao'an, left and right are included in the Xiang army, or the local army, for the most powerful forbidden army in the Northern Song Dynasty, there is not much impact.

The main combat effectiveness of the Northern Song Dynasty lies in the forbidden army, only the forbidden army, is the highest quality, and the best equipment, if the financial state of the Northern Song Dynasty has been kept healthy, the combat effectiveness of the forbidden army can be maintained, but the recklessness of Shenzong, coupled with Wang Anshi's stubbornness, consumed the last bit of strength of the Northern Song Dynasty, in the future, when Jingkang was humiliated, 800,000 forbidden troops, only left the surface data, simply unable to resist the wolf-like Jin army, even the emperor was captured, leaving another endless humiliation.

However, the Zhao'an pirates, in the entire history of the Northern Song Dynasty, are really rare, the Northern Song Dynasty itself is strong, especially now, the combat effectiveness of the forbidden army is not weak, although there is no deliberate focus on the navy, but the five major water systems connected by the canal, this is the top priority of the Northern Song Dynasty, for the protection of the canal, it is also very in place, coupled with the large number of foreign sea trade, although the Northern Song Dynasty is only on the seaside, less than 20 patrol battalions are arranged, but each patrol battalion is not the pirates can deal with.

Although the shipbuilding industry in the Northern Song Dynasty was relatively developed, there were very few people in the Northern Song Dynasty who really devoted themselves to maritime trade, and even if there were, they were just some sailors, merchants of the Northern Song Dynasty, sitting in the port, sitting on the ground to receive goods, there was no need to venture to the sea, there was no conflict of interest, the death of some sailors, would not affect the overall situation, without the promotion of the wealthy class, there would be no targeting of pirates, let alone any edict.

These pirates from remote fishing villages, among the pirates in the entire South China Sea, they are considered to be the milder kind, and it is rare for them to have the moderation to come to Zhao'an, or in this situation, of course they will agree, and they will also agree to ask the three leaders for instructions, but they can't help the three leaders make decisions.

Sun Ji didn't care much, he just asked some things from the mouths of these pirates in his routine inquiry, mainly the surrounding situation, as well as the islands they controlled, but inadvertently, he knew that there were many islands in the Yellow Sea and the East China Sea, some of which went deep into the sea, and some of them even produced some of them.

The fleet sailed in 2 days, and the battle in less than 2 hours had already come to an end, and the entire interrogation process lasted almost 2 days, and Zhang Zhonghe was not idle, he not only made some simple measurements and tests on the island, but also traveled all over the island.

This is a large island, 15 kilometers of island, with land and fresh water, although these islands, it is impossible to develop this island on a large scale, but in the mountains, there are still 1,500 acres of terraced fields, used to grow some food crops, but can also support the survival of 1,000 people.

The location is more suitable, it is located in the Dinghai Navy to the east and south more than 90 miles, in terms of the speed of the sailboat, it takes at least 5-6 hours to go all out, which is exactly about a day's time, this can become the outer barrier of the Dinghai Navy.

Unlike Sun Ji, who didn't study naval warfare much, from the moment he was appointed as the captain of the detachment, he had an indissoluble bond with naval warfare.

For the Northern Song Dynasty, there was no precedent for naval warfare, but Zhao Xin had summarized countless things before, and a lot of knowledge in the consulting era was chaotic, and some simple naval warfare knowledge could still be written.

For example, to seize the upper hand, for example, the T-position, and, for example, the tactics of these island chains.

Even during World War II, the island-hopping tactics adopted by the United States were very dangerous, and in the later stages of the Pacific War, Japan, which was weak, chose this point to minimize the threat when the task force, especially a large number of aircraft carriers, was sunk and the carrier-based troops could not be replenished.

If it is placed in the early stage of the Pacific War, in the Pacific theater, Japan even has an advantage because of the sneak attack, and at this time, the use of island hopping tactics will be seized by Japan to counterattack.

The ocean is boundless, as long as there are sailing ships, then there are roads everywhere, if you want to protect the safety of the island, its own defense is on the one hand, in the Ding Navy, there are Zhao Xin to build a large number of fortresses, every 500 meters or so, with the help of longbows and various ballistas, not to mention the pirate fleet of this era, even if it is the peak of the Age of Discovery, the Spanish Armada, and the British Armada, all of them come over, it is difficult to break through this defense.

Even if there is no artillery on top of these forts, it is the same, through the bed crossbow synthesized by a special method, they have actually crossed the primary artillery.

Artillery is a weapon that uses chemical energy, through chemical energy, in a confined space, to push the projectile, flying forward, but the bed crossbow is the use of mechanical energy, and even in a certain sense, as long as the bed crossbow has enough power, it is more powerful than artillery.

In the early days, artillery was a few round shells, and in the era of flowering shells, it was also round, but crossbow arrows, from the very beginning, were enlarged versions of bows and arrows, which were more suitable for fluid mechanics, and in high-speed flight, the resistance was less, and the space attitude was maintained better.

In feudal society, according to the speed of technological development, it is generally unlikely to develop to the power of 150 stones, but under the promotion of the card system, some of the higher quality metals obtained have even reached the advanced level of the 21st century.

With such a material, the crossbow arrows that are made without sparing any effort, and because of various labor-saving machinery, two or three people can operate them, and in terms of power, he is no less than ordinary artillery.

Even if by 1840, the whole of China will sink into the British and French fleets, and the range of their main artillery will be within 3 miles, that is, 1500 meters, you know, the accurate range of the bed crossbow is about 1200 meters.

Compared with the impact of uncontrollable chemical energy, when the gas propulsion has not been studied, the round cannonball can only go in one direction, with an approximate range, and the naval battles of this era often last more than a day, and sometimes, a battleship with more than 100 guns fired dozens of salvos, but in the end few hits.

But the crossbow is different, itself is aimed at a certain aspect of the precise design, the crossbow arrow after a certain amount of processing, the air attitude is very good, after the use of simple visual aiming, the accuracy rises, may not be able to reach 1800 steps away, to the extent of 100 steps through Yang, but the error will never exceed two meters.

Two meters, for an attack by a single person, is a long difference, it is possible to attack casually, it is possible to hit, but for a ship, this is no problem.

A ship, even if it is a fleet of 200 materials, there are a few meters, more than 2000 materials of the ship, even more than 20 meters, the sail is sometimes larger, in the Chinese style sailing ship, the most famous 2000 materials of the sea ship design, the width of the simple sail, more than 5 meters.

More accurate design, not much worse range, and even if Zhao Xin can get an early artillery, under the premise that the refining of gunpowder has not reached a certain level and the technology of the artillery has improved, the defensive weapon is even inferior to a crossbow!

Dozens or hundreds of fortresses, many guarded soldiers, and a series of bed crossbows, on top of a fortress, at least 10 bed crossbows can be placed, according to the reality of the simulated attack, even if it is a sail battleship, a fortress can defeat more than 10 ships.

The defense of the mainland is not a problem, but the shipping lanes are to be secured, which requires the occupation of a series of islands, above the sea, in an aimless circle, even according to the visibility of 5 kilometers as a circle, circle by circle, with the current situation of the navy, to investigate the surrounding 200 nautical miles, it will take a long time.

An island, whether it is suitable, whether there is enough area, and location, etc., these are not simply equipped with it, and the emergence of such a pirate island is of course the best choice.

The presence of mountains means that there are relatively strong fortresses and campsites, there are many plains and lands, and a large number of crops can be grown, but most importantly, there is a water source.

Even during World War II, the problem of fresh water was a difficult problem to solve, and for islands without fresh water, unless the location was extremely important, holding some chokepoints, and maintaining them by means of transporting water, other important islands, islands where airports were built, all had fresh water.

The reason why the Pacific Ocean is still a little far away, near the continental shelf, as long as it is a slightly larger island, can be excavated for the simple reason that these islands are all stony islands, part of the ancient continent, not like these islands in the depths of the sea, some are coral reef islands, some are sandy, and cannot store and filter water.

The entire detachment stayed on this pirate island for 5 days, and finally left a team of 600 people to defend the island, and the rest, with the captives triumphantly returned to the camp, and the first very important battle in the history of the Navy ended in complete victory.