The war between the Iran-Syria Federation and Israel is a war that has been closely watched by countries around the world.

The reason is incomparably simple, this is a highly technological militarized war confrontation in the history of human warfare, and it is also a war that can be called symmetrical strength.

Although Israel lost air and sea supremacy in the early days of the war, Israel still possessed extremely powerful ground combat capabilities by virtue of its well-equipped and well-trained ground forces.

In this war, the two sides have fully demonstrated the modern mode of warfare that various countries are exploring and discussing.

However, when the war continued, the whole world saw a somewhat different pattern of war.

Large-scale artillery clusters, rarely seen in modern warfare, have once again appeared.

It is undeniable that artillery shells are relatively cheap compared to the cost of modern warfare.

Under air superiority, the large-scale use of artillery groups can greatly reduce the cost of war, at least without relying too much on the support of the air force, and the ground forces can meet their own fire strike support.

It's just that in this war, the Iraq-Syria Federation once again showed a cluster of firepower in front of the world, which feels more like the battlefield of World War II.

It's completely dense firepower coverage, and it doesn't even look like there's a bit of technology.

However, in the eyes of all insiders, such a move by the Iraqi-Syrian Federation is very reasonable and the most practical means of warfare.

In the face of Israel's homeland defense plan, it would be truly unreasonable to fill the Israeli army's defenses with soldiers' lives.

In the right advantageous situation, the large-scale use of artillery, the use of cheap shells, to effectively hit the opponent, such a deal is very suitable.

It's just that the intensive shelling of the Iran-Syria Federation gives people the feeling that it is more like a waste of ammunition, a blind attack, and there is no order to speak of.

However, in the eyes of all US military intelligence analysts, the purpose of the Iraq-Syria Federation in doing so is clearly targeted.

Among them, the biggest target is to destroy the civil air defense projects in the old city as much as possible.

Civil air defense engineering, also called civil air defense fortifications, refers to underground protective buildings built separately to ensure the shelter of personnel and materials in wartime, civil air defense command, and medical aid, as well as basements that can be used for air defense in wartime in combination with ground buildings. Civil air defense engineering is an important facility to guard against a surprise attack by the enemy, effectively cover personnel and materials, and preserve war potential. It is an engineering guarantee for persisting in fighting in towns and towns and supporting the anti-aggression war for a long time until victory.

After Israel seized the city from the Palestinians, the civil air defense project in Jerusalem set off a civil air defense project that lasted for more than a decade.

With the help of the undulating topography of the city of Jerusalem, a variety of civil air defense engineering designs and constructions have been carried out.

In fact, the underground industrial kingdom of Marin City, strictly speaking, is also a civil air defense project.

Civil air defense projects are not simply the construction of underground defense facilities, but all have professional requirements.

Civilian bomb shelters are the simplest and most basic civil air defense projects.

Of course, during the Cold War, in order to avoid a possible nuclear attack by the Soviet Union, all cities and towns in the United States had a large number of civil air defense projects, mainly air-raid shelters.

In Jerusalem, bomb shelters are everywhere, along with many other types of civil air defense projects.

These air defense projects all require that they can withstand impacts and explosions of sufficient intensity, and even nuclear weapons defense projects.

Within these air defense projects, they can be divided into command and communication, personnel shelter, hospitals, ambulance stations, warehouses, garages, and so on.

Unlike all peaceful countries in the world, Israel has never regarded these air defense projects as peacetime economic construction projects, nor has it ever opened them to the outside world.

Even most Israelis do not know where the exits to these air defense projects are, and they only have access to simple civil air defense facilities such as bomb shelters.

With the relationship between the United States and Israel, the United States still does not know exactly how far the civil air defense project under Jerusalem has been built, and no complete drawings have ever been leaked out, and this has always been a top secret belonging to the Israeli military.

The United States believes that the Iraqi-Syrian Federation is definitely guarding against Israel's air defense projects, after all, no one can rest assured when they think of the hidden enemy hiding under the city that can appear on the ground at any time to counterattack.

Therefore, in the eyes of the Americans, the biggest purpose of the Iraqi-Syrian Federation's carpet shelling of the old city and the destruction of a large number of houses is to conceal the exit of the civil air defense project in this area of the old city and bury it with collapsed buildings.

Otherwise, the battle for the commanding heights in the city of the old city will be endless.

It is even quite possible that in the large rear of the offensive of the troops, a large number of Israeli troops suddenly appeared, which would be a disaster for the attacking army.

In fact, just as US military analysts have analyzed, in the battle for Jerusalem, in Cai Ruichen's view, the biggest problem is not conventional urban warfare, but dealing with these air defense projects.

Of all the countries in the world, there are not many countries that have the economy, time and energy to build civil air defense projects.

Of all the countries in the Middle East and Africa, only a few have civil air defense projects of a certain scale.

Iran's civil air defense projects have only begun in recent years, decades older than Israel's.

In Israel, almost all cities have various civil air defense projects, and the more important the city, the more confidential and complex the construction of civil air defense projects.

At present, Cai Ruichen does not know what the civil air defense project in Jerusalem looks like, nor does he have any drawings, and he basically knows nothing about the exit of the hidden civil air defense project.

The only information he had now was a relatively simple figure, 1,200 kilometers, and the total length of Jerusalem and all the civil air defense projects in the vicinity had reached an astonishing 1,200 kilometers.

Although this figure is much smaller than the more than 3,000 kilometers of civil air defense projects in his hometown of Shanghai, you must know that the area of Jerusalem is not even as large as that of a district in his hometown of Shanghai.

This is also a reason why Cai Ruichen has to be vigilant, and of course there is another important reason, so far, the main combat force of the Israeli ground forces has not yet appeared. (To be continued.) )