After these materials are transported here, it is basically difficult to use heavy four-wheeled carriages to quickly transport them to the front line on a large scale, because after arriving here, there are basically no good roads such as official roads for heavy four-wheeled carriages to pass.

Although these heavy-duty four-wheeled carriages carry a heavy load, the requirements for the road are also relatively high, although it is not required to be a cement hardened pavement, but it must also be a smooth, solid gravel and dirt pavement.

If horse-drawn carriages were to continue to be used to transport supplies on such routes, the carrying capacity would have to be reduced, or horse-drawn carriages would have to be used altogether.

In the eyes of the military, this is not worth the cost, because it will cost a lot of horses, and it is better to free up the horses for the front-line troops and heavy rapid transportation in the rear.

Horses are very valuable materials, and although the army uses a large number of horses, it has to be mentioned that most of the military horses are concentrated in the front-line troops, not to mention those war horses, and most of the service horses are also concentrated in the baggage troops of the troops, and they need horses to undertake the last section of transportation tasks in the most dangerous and front-line places.

At the same time, in the section from the port to the strategic material reserve station, because the road is good, the heavy four-wheeled carriage can play a role, so this section of the road is also equipped with a lot of horses.

As for the distance from the strategic material reserve station to the front-line material transfer station, a large amount of manpower and wheelbarrows were used.

Horse-drawn carriages will not be the main means of transport for this stretch of the road, wheelbarrows will be!

Although the wheelbarrow wastes manpower, it basically has no requirements for the road, and the transportation volume is not small, so it can just be used as the main force of transportation on this road section.

However, after arriving at the front-line material transfer station, the next transportation became horse-drawn cart-based, because the front-line material transfer station went further, that is, it was transported to the troops.

This section of the journey is often within 50 kilometers, but because this distance is already in the range of engagement, the possibility of the enemy appearing is extremely high, so for safety, the use of horse-drawn carriages is the best choice.

According to years of experience, the Tang Army has summed up a set of tactics that rely on four-wheeled carriages for field defense, and the most basic tactic is to encounter the enemy, especially when the enemy cavalry attacks, the four carriages are directly connected end to end to form a hollow carriage phalanx, and the soldiers rely on the carriage for defense.

This defensive method is quite effective, although there are only four carriages, and the soldiers are estimated to be only a dozen or twenty, but even if dozens of cavalry encounter this kind of chariot formation, it will be numb in the scalp, and in the face of this kind of chariot formation similar to a small fortress, it is often necessary to pay a heavy price to conquer.

What's more, the chariot formation composed of four carriages is only the most basic tactic, and in actual combat, it is often more than a dozen vehicles dispatched together, and even large-scale operations are dozens of hundreds of vehicles, such a huge estimated chariot formation, even if it is hundreds or even thousands of enemy cavalry, will feel quite tricky, although sometimes it can break through this kind of chariot formation, but often there are heavy casualties.

The good defensiveness of the car formation is also an important reason for the large-scale application of the Datang Army, and it is very fond of using four-wheeled carriages.

From factories to ports, from ports to strategic reserve stations, to front-line transit stations, and then to front-line troops, all kinds of logistical supplies such as ammunition are continuously transported to the front line and used by the troops.

Of course, if you just want temporary transportation, it is naturally impossible, in fact, in order to launch the Northeast Campaign, the empire has been transporting materials for more than half a year in advance, and a large number of materials have been transported to the major strategic reserve warehouses in advance, and it is also a transit station that has transported part of it to the front line in advance, and even the troops have carried a large number of materials with the army.

Even if the rear does not produce and transport materials, the strategic materials stored in the northeast region alone are enough to maintain the operation of the army for more than half a year.

However, it is obvious that the battle in the northeast region cannot end within half a year, it is only the early maneuver time, even if the Chahar, and Duoyan tribes are defeated, but there are still many chaotic natives to fight behind.

The army estimates that there is hope that the main battle will be ended within six months, and by the time winter comes, the main battle will have ended, and then the troops will begin to enter the stage of rest, and at the same time carry out a small-scale clean-up operation, and wait until next summer to launch another large-scale sweeping attack.

The duration of the entire Northeast Campaign is likely to last more than two years.

Of course, in the past two years, it is not that every day has been fighting, in fact, the time before and after the outbreak of large-scale battles in the war is estimated to be only a few months, and most of the remaining time is spent adjusting troops, resting, replenishing supplies, and conducting small-scale purge operations.

This is the estimation of the army leadership, but Fang Xitong has other ideas, he hopes that before this winter, the front will be advanced to Heilongjiang, as for the purging operation, he hopes that when the main force is fighting on the front line, the reserve division troops in the rear will be deployed at the same time.

If you want to describe Fang Xitong's strategic plan, then the main force is a fist, ruthlessly annihilating and crushing a large-scale enemy, and the reserve troops in the rear are vertical, following up in the rear and clearing out the remaining small-scale enemies.

That way, you don't have to go back and comb it over and over again.

According to Fang Xitong's strategic planning, the requirements for the cavalry troops were even higher, and he asked the cavalry corps led by Kang Changning to be able to maneuver in place within half a month, cut off the contact between the enemy's various units, and then break through the enemy's various units.

Kang Changning, who had already started the attack with his troops, also knew that the core of his action this time was to be fast.

It was so fast that those alien tribes couldn't react, and before they could react, they were divided and surrounded, not giving them time to mobilize and gather troops, and preventing them from having the opportunity to flee north.

Because Fang Xitong was unwilling to just simply repel them, and then after these alien races reacted and assembled, he needed to face the counterattack of these people.

On 26 April, the 1st Cavalry Corps led by Kang Changning and the 2nd and 3rd Cavalry Corps that cooperated with him in the battle attacked more than 200 kilometers in one go after many days of running.

At this time, Kang Changning had actually surrounded several small tribes of Chahar people behind him, but he did not waste time attacking them on the road, but did not stop at all, running wildly.

After many days of running, these tens of thousands of cavalry continued to gallop north after resting for two days!

This time, they ran more than 200 kilometers north in one go!

By the time of May 2nd, the three cavalry corps led by Kang Changning had already appeared in the core area of several main tribes in Chahar!

Next, there will inevitably be a large-scale war with the local aliens!

When Kang Changning led more than 40,000 cavalry to fight with the Chahar Department, the infantry artillery and other Chinese troops led by Fang Xitong in the rear were still more than 200 kilometers away!

However, the connection between the two sides has not been broken!

Through the continuous reports of the envoys, Fang Xitong has always known the movements of Kang Changning's department, although the time when he learned the news was often two or three days later, but he could be regarded as knowing the news and would not be confused.

When Fang Xitong, Kang Changning and other generals were fighting in the northeast, the navy also launched its own operation, that is, landing in Vladivostok and the mouth of the Heilongjiang River.

In this operation, although the navy did not communicate with the army, it still reported to Li Xuan, and Li Xuan also felt that if the navy could control Vladivostok and then obtain the mouth of the Suifen River, it would also be able to cooperate with the army to attack Shuangcheng in the future.

On the Heilongjiang side, there is no large-scale foreign enemy, but it is located in the far north, and it is difficult to supply, if the navy can open up the Heilongjiang River and control the Heilongjiang River, then it can rely on the Heilongjiang River to establish a river transportation supply line, which will give the army great convenience in the above-mentioned areas.

So Li Xuan also approved the Navy's actions.

As for the army, although there are some doubts about what the navy suddenly carried out at this time, such as the Suifenhe and Heilongjiang plans, but since the navy itself did it, the army is too lazy to deal with it.

Nowadays, the focus of the army is on the Northeast Campaign, and the core task is to annihilate the left-wing tribes of Mongolia such as Chahar and Duoyan Sanwei, followed by the annihilation of various chaotic indigenous tribes entrenched in the eastern part of the Northeast and the Northeast region.

If the navy can establish a river supply line, it will also bring great benefits to the army, so the army is also happy to see it.

Of course, in the early stage of all this, the navy should not expect the army to help them, let alone occupy the supply materials in the northeast region.

The Navy has no opinion at all about this!

Anyway, the navy is not an army, so there is no need to send too many troops in the above-mentioned combat areas, at most a few thousand marines.

As for supplies, the navy is preparing to transport them from the port of Busan, and in addition, it can also obtain some supplies from the Fuso area.

At present, the Tang Empire has established a colony in Fushan City on Ezo Island, and you can also get certain supplies from this colony.

After obtaining permission from Li Xuan, the naval side quickly began to move, and the naval fleet stationed in Busan set sail and carried a battalion of marines to Vladivostok.

According to the intelligence previously detected by the navy, Vladivostok is still a wilderness, with only a few indigenous people living here, and there is not even a small town.

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