The relationship between Western Xia and Liao is not intimate, nor can it be said that the lips are cold and the teeth are cold, it should be the Northern Song Dynasty and the Western Xia, because among the three kingdoms, the Liao State is obviously the most powerful. Pen @ fun @ pavilion wWw. ｂｉｑUｇE。 ｉｎｆｏ

However, there are more contradictions between the Northern Song Dynasty and the Western Xia, from the accession of Renzong to the period of Shenzong, a hundred years, between the two countries, there are endless battles, almost everyone is holding the idea of destroying one side, but for the Western Xia, it is a utopian, this fantasy, but it has become the biggest culprit that dragged down the Northern Song Dynasty, and the Jurchen of the Ming Dynasty is the same, between the founding of the Northern Song Dynasty, the military expenditure spent in the northwest, a hundred years, may be as high as 2 billion, this is a terrible, frightening number.

Throughout the history of the Northern Song Dynasty, the struggle between the Northern Song Dynasty and the Western Xia continued, and the Western Xia fought three wars, almost all of which were fought with the Northern Song Dynasty, but the Western Xia officially stabilized it in 1044 when the Western Xia fought with the Liao State.

The cause of the war is very simple, at first Yuan Hao asked the Liao State to send troops to assist him in attacking the Song Dynasty together, but because Fu Bi made Liao and pacified Liao Xingzong, he did not continue to send troops, but asked Yuan Hao to send troops to help him quell the rebellion of the internal tribes.

Yuan Hao led the Western Xia army to do so, and helped for a long time, Liao Xingzong did not benefit Yuan Hao at all, but took all the captured booty to his camp, Yuan Hao was very angry. Immediately after the princess of Liao who married Yuan Hao fell out of favor and passed away soon after, Yuan Hao pressed for a long time before telling Liao Xingzong that this time it was Liao Xingzong's turn to be angry.

After both sides were very angry, Yuan Hao sent people to provoke a rebellion among the tribes in the Liao Dynasty and killed the envoy sent by the Liao Xing Sect, which completely angered the Liao Xing Sect. He decided to teach this newly rising little brother a lesson, so that he knew that he had to listen to his words.

This war was just opened, the Liao State raised 100,000 troops, and came to the Western Xia with great momentum, and the movement was very large, but Yuan Hao used delaying tactics, first defeated and retreated, and after leading the Liao army to drive straight in, he concentrated his forces for a decisive battle.

Under the first battle, the Liao army that went deep into the northern wasteland was defeated, and most of the 100,000 Liao troops were lost, including Xiao Huliang, a large number of ministers were captured, and Liao Xingzong fled in embarrassment.

From then on, the Western Xia completely gained a firm foothold, and in the negotiations with the Liao State, occupied some advantages, and since then, between the Liao State and the Western Xia, there was no longer any war, until the Liao State was destroyed, seventy or eighty years later, the Western Xia and the Jin State war.

After the battle of Western Xia, it finally changed from a dependent force to a force that really communicated with the Liao State on an equal footing, and even in the many wars that followed, even if the Western Xia was beaten very badly by the Northern Song Dynasty and was about to fail, the Liao State would exert pressure, even if it did not really do it, but it contained the Northern Song Dynasty, so that the Northern Song Dynasty could not attack the Western Xia with all its might.

Among the Three Kingdoms, the Liao State has always occupied a psychological advantage, even in 1044, defeated by the Western Xia, the same did not change this psychological advantage, after the appearance of cement and fortresses, the Western Xia, who had defeated the Liao State, was about to destroy the country so easily.

No matter how sluggish the Liao State is, it can be seen from the official documents asking for help, one by one, it is getting more and more dangerous, and the conditions of the promise are getting higher and higher.

No matter how short-sighted the Liao State is, it is impossible to sit back and watch the demise of the Western Xia, the death of the lips and the cold teeth are not counted, the experience of the Western Xia has attracted the attention of the Liao State, and it is this kind of attention that makes them startled.

The Liao State is also a cavalry tactic, at most a little larger than the Western Xia, and the overall strength is a little higher, but seeing such an iron bucket array and layer by layer of breakthroughs, they have no choice, they really substitute for themselves, there is no other way than to retreat.

Western Xia only has five states, and if there is no way to retreat, you can only surrender, and the Liao State may be better, but with the area of the country, it can't hold on until the Northern Song Dynasty, is this possible? I am afraid that even the most radical Liao generals do not think that they can rely on their homeland and drag down the Northern Song Dynasty.

The Northern Song Dynasty does not have to completely occupy the Liao State, as long as it takes the Western Xia, coercs the Tibetans, and then takes the most elite part of the Liao territory of the Sixteen Prefectures of Youyun, the Liao State has no ability to fight back at all, these territories may be larger than the Western Xia, but they can't resist for long, once the Northern Song Dynasty restores the Han and Tang Dynasties, then the Liao State is really a nomadic people, and the name of the Central Kingdom is completely unusable.

The iron barrel array and cement have become the most terrible military weapons in the entire Northern Song Dynasty, and the core of the two is cement, which was obtained by the Liao State and the Western Xia Dynasty for a long time and with great cost.

The cheapness and excellent performance of cement can be combined with the defensive ability of the Northern Song Dynasty, making this weapon the first choice of the Northern Song Dynasty, and the Northern Song Dynasty also knew that when fighting against the Western Xia and the Liao State, giving full play to their own advantages is the key to victory.

What is the advantage of the Northern Song Dynasty, defend the city, but defend the city, there must always be a city to defend it, go deep into the interior, the big cities are numerous, whether it is the Liao State, or the Western Xia, can not attack it, and even the Jin State suddenly attacked, broke through Kaifeng, but the last stop in front of the Yangtze River, the huge territory of the Central Plains and a dense city, so that the nomadic iron horse, can not enter smoothly, the Jin State is so, Mongolia is the same, not from the Middle East Huihui artillery appeared, maybe they are facing the city's iron wall, still can only look at the ocean sigh.

In this era, the siege capacity of the Liao State and the Western Xia State was not as high as the later Jin State and the Mongol State, and the contention between the Northern Song Dynasty and the Western Xia Dynasty was more in the border areas, in some grasslands and desert areas, and the contention for some strategic points was almost repeated several times.

If the Northern Song Dynasty has an advantage, it will build a city, stick to an area, and push the defense line and battle line forward a lot, if the Western Xia has an advantage, after breaking through the city, the first choice is to destroy the city, some places, back and forth for many years, the city is built and destroyed, I don't know how much.

The military of the Northern Song Dynasty knew that as long as the city was built well and connected into a chain, the Western Xia would not be able to attack it at all, which was something that any low-level officer knew, but the Northern Song Dynasty did not do this.

The reason is very simple, the construction of a city, the cost is huge, to be strong, not only the use of a variety of masonry, glutinous rice pulp and manpower is also quite huge, in addition to the city, there are garrisons, 10,000 people, can withstand the attack of 50,000 people, but more than 50,000 people are difficult, a single city is huge, if the garrison is enough, then more, this is also the late Northern Song Dynasty, just a Western Xia battlefield, the annual cost of more than 30 million Guan.

Now, cement appeared, you can solve this problem, adhesion is very important, but cheap is the key, the price of cement mortar is about the same as yellow mud paddle, the output of red bricks and cheap, compared with adobe bricks, only slightly up a grade, in this case, the cost of building a city, on the basis of the farmer's adobe house, rose by less than 50%.

This is still expensive for ordinary farmers, because even if it is 50% more, it is not something that ordinary farmers can afford, and a penny has to be broken into eight petals to flower. But for the Northern Song Dynasty, it was cheap, and the cost of building a city may only be one-half or one-third of the previous one, one plus one is not equal to one, and then it is not equal to three, that's what it says.

The same plot, the construction of a city, and the construction of three cities, is completely different, one is called the key point, it is easy to be set on fire by the army, but three cities, not only the density of the garrison has increased, the defense strength is not as simple as 3, various tactics are more flexible, three points become a fixed point, and become a defensive surface.

Point defense is easy to pull out, but how to deal with the surface defense? In the face of systematization and mutual echoing, it is completely possible to use any point as a fixed support to attract the enemy, and then the other two points, or outflank, or break the attack, under the strategy of China's art of war, the hands and feet that can be done, and the variables that can be generated, can be huge.

Cement and red bricks can reduce the cost of building a city by three percent, which is a natural good news for the large-scale construction of the Northwest to defend the Northern Song Dynasty, even if there is no fortress, the appearance of cement makes it suitable for the Northern Song Dynasty to defend the city, and now it will go further.

Zhao Xin just forgot it, he knew that the feudal society, whether it was the Han and Tang dynasties or the Northern Song Dynasty, they were all wrong in terms of defense, they not only strengthened the city defense, but also regarded the city as the core of a region, that is to say, the military use of the city is only a part, and there is a considerable part of the civilian use.

On the contrary, Europe has embarked on a different path, cities are cities, unless they are like capitals, or regional core cities, such are relatively rare, maybe only one in 100 cities, it is a combination of military and civilian, not only civilian facilities are quite large, but also military facilities.

With the exception of these, most of the cities, or castles to be exact, were used exclusively for military purposes.

In other words, in this castle, there are very few civilians stationed, at most they are knights and nobles and their families, and the rest are all specialized armed forces.

Professional, on behalf of the powerful, the tragedy of the siege in history, more or less related to the internal civilians, when all the food is eaten, in the end it is either the city of the army is broken, or the cannibalism is mad.

Let's take an analogy, a city of 30,000 people with only 5,000 garrisons is the same as a city with 7,000 garrisons and no civilians, who will guard for a long time under the premise of the same food.

The border military states, especially the newly attached areas, have no need to integrate military and civilian use, and cities do not play much of a role in integrating military and civilian use, but are not as good as professional military use.

Among the castles for professional military use, Zhao Xin certainly knew the most terrible fortress in the ancient castle, and Zhao Xin took out the most suitable cement fortress while sending cement.