The Grand Canyon of Odin, where the Northern Fortress is located, is only the largest gap in the Odin steppe and the Andes Mountains, but it is not the only one, and there is no shortage of various mountain trails, but it is not suitable for large-scale marches.

Previously, Sean didn't care much about these small gaps, because the Eternal Night Army's development in the Andes Mountains was focused on the Jacob River basin and around the Andes Inland Lake.

Except for a very small number of stubborn mountain people, those who could migrate were all migrated.

After the resumption of the Jacob River, the Eternal Night Army was able to concentrate the population in a sparsely populated area, which was not only convenient for management, but also able to concentrate forces and develop production.

Even those Odin orcs who entered the Andes Mountains through those small gaps and found that there was no suitable object to raid, most of them retreated on their own.

The Orcs of Odin have no shortage of territory, change their living habits, and the possibility of settling in the mountains is very small, more to plunder wealth.

When it turns out that it is not profitable, nature will not come again.

Occasionally, those who try to settle here are only to deliver food to the Eternal Night Army, kill or surrender, and eventually become part of their population.

But Naren Toya's Undead Empire is different.

Everywhere they passed, they brought death and destruction, whether they wanted it or not.

This is evidenced by the tribe led by Prince Irbis, who originally dreamed of establishing a kingdom with Naren Toya where the living and the dead coexist, mutually beneficial and mutually prosperous.

The kingdom did not last for two years before it ended with the mass death of the living.

Those immortals who have broken life and death are out-and-out law breakers, and when they gather in large numbers, the breath of death carried by their bodies can directly change the surrounding environment from the level of the law, so that it is no longer suitable for the living to live.

If a living person is in that environment for a long time, there are only two possibilities, either die and the corpse is manipulated by them, or become one of them.

For them, the Eternal Night Commanders naturally have to guard against them to prevent them from infiltrating on a small scale and using biological and chemical weapons such as viruses to bring large-scale destruction to their people.

This is not the conjecture of the Eternal Night Leaders, but their special operations force, which has secretly wiped out a large number of fanatical undead advance troops.

Those fanatical immortal advance troops are a bunch of out-and-out faith lunatics.

The fanatical belief in the goddess of night and winter has filled their souls with fire.

They believe that they are the chosen ones, the forerunners, and the meaning of their existence is to transform this land according to the will of the goddess of night and winter.

One day, the goddesses of night and winter will use their supreme divine power to open up the kingdom of God and make this land a part of the kingdom of God, where they will be reborn and achieve eternal life in the true sense.

Of course, this information was not tortured from the mouths of the advance troops of the fanatical immortals.

At first, they became immortal because they were afraid of death.

Fanatical faith, but they overcome the fear of death.

When they have overcome their last fears, they are fearless, how can they reveal the information of their gods?

But in Sean's hands, there is no need for them to speak in person.

It is more convenient to purify their soul fire with law runes and read their memories directly.

It not only ensures the accuracy of the intelligence, but also has the additional income of the power of the law.

The Zealous Undead Advance Force is targeting not only the Eternal Night Leader, but also the Byronic Alliance.

For the past four years, they have been there no less, taking advantage of people's fear of death to secretly develop cult adherents.

It's just not as effective.

There is already a Holy See here.

By doing so, the Empire of the Dead is tantamount to dividing the papal see's cake.

This is the scale that touched them.

Not to mention, their teachings themselves are contrary to the nature of human existence.

Being labeled a cultist by the Holy See and sparing no effort to hunt down and kill him has naturally become a matter of course.

Compared with the Broken Pulse Defense Line guarded by the Straitch family, the Northern Defense Line of the Eternal Night Army is shorter.

To the west of the Northern Fortress lies the Roof of the World Sanset Peak, where the mountain is so high and dangerous that even the undead of the Undead Empire are difficult to climb from here, and it is enough to put a few watchtowers here.

The northern defense line was mainly east of the Northern Fortress, adjacent to the Kogel Prairie and Balsing Prairie, and extended to the junction of the Kentana Icefield.

In order to make fuller use of the mountainous terrain, in many sections, the Eternal Night Army Commander set aside twenty or thirty kilometers at least, and at most set aside hundreds of kilometers of residual veins as a defensive buffer, which is equivalent to losing tens of thousands of square kilometers of territory in vain.

The biggest advantage of this is that the defense line of the northern fortress has changed from 520 kilometers to 350 kilometers.

The number of defensive gaps that needed to build small and medium-sized fortresses was reduced from eighty-three to fifty-two, and the number of soldiers who needed to be stationed naturally decreased.

War.

Especially when it comes to two forces, millions of living beings who live and die.

The gains and losses of one city and one place are somewhat irrelevant.

As long as you can win the final victory, no matter how much you lose, you can regain it.

If you start with a high march and then lose the last battle, all the previous victories will be false.

After so many years of tempering, the ruling class of the Eternal Night Army Leader has a deep understanding of it.

The northern defense line created by the Eternal Night Army leader is not the same as the Broken Pulse Defense Line.

Both openly and secretly.

On the bright side.

A defensive fortress built on the basis of the mountain terrain is a must.

Artillery, that's not to mention.

The arsenal directly under the Firearms Bureau of the Eternal Night Army, with sufficient raw materials, produced the number of artillery pieces at full capacity, which is by no means just a Jiangmen port and an explorer fleet.

The real big head, transported to the northern defense line, as well as to the major armies.

However, artillery is not the main force of the undead legions defending against the undead empire, the round pillars that stand on the city walls are.

These round pillars, nothing else.

It was the medical tower that the Eternal Night Army leader had researched and was preparing to use to treat the undead virus.

It's just that the countermeasures of the laws of the plane have greatly reduced the threat of the undead virus, and this plan has died halfway, and the medical tower has lost its usefulness.

However, the effort spent at the beginning was not wasted.

Sean countered the undead according to the laws of the plane, adjusting the magic circuits of the medical towers, so that they changed from life-saving equipment to lethal weapons specifically aimed at the undead.

This tower has a new name - the Purification Tower.

Although the Purification Tower, like sunlight, is difficult to kill the undead directly, it can greatly weaken them.

In addition, the purification tower also has a unique effect - early warning.

They usually run at low energy consumption, emit a soft glow, and can even be used as street lights at night.

But as soon as an undead spirit enters its envelope, it immediately emits a fiery glow that burns them.

Since the establishment of the Purification Tower defense, the infiltration of the Undead Empire's Zeatic Undead Advance Army into the Eternal Night Territory has been greatly reduced.

Where the Eternal Night Army leads the northern defense line is really powerful is in their dark lines.

Most people think that the Eternal Night Army's magic tractor is the terminus, and the Northern Fortress is the terminus, but in fact, it is not.

The Northern Fortress is only a transit point, and it is also connected to another line, the main body of which is located directly below the Northern Fortress.

In other words, the Northern Defense Line of the Eternal Night Army was built on this magic tractor subway.

Needless to say, the benefits are there.

The Northern Fortress as a whole.

The magic guide subway has arrived, which means that the energy transmission pipeline has arrived, and they have entered the network state, and the energy supply facilities such as the purification tower, which require the use of magic energy, are all online.

Once there is an abnormality, the General Control Department located in the consciousness space of the Northern Fortress will monitor it as soon as possible, including the situation of going off the network, and the General Control Department will also notify the nearest checkpoint to send someone to check the situation as soon as possible.

Not to mention the ease of transportation of materials.

Even if it was from Bresan to transport troops and military supplies, it would not take a day before and after.

And since owning the earth-digging purple worm, a ground-digging artifact.

The entire Eternal Night Warlord, like a hamster, began to dig frantically and hoard all kinds of military supplies.

Except for Sean, no one knows how many magic warehouses and how many military supplies the Eternal Night Army has built and hoarded under the northern defense line.

As the core of the entire northern defense line, the Northern Fortress is naturally a top priority.

Now it is definitely worthy of the title of fortress, and after the frontal wall that has been covered many times, it is already thirty-three meters.

The height alone makes many enemies desperate and give up preparing to attack it.

Not to mention the rebuilt city wall, it is by no means a brick and earth city wall in the ordinary sense, but it is integrated with the mage towers of the northern fortress, which has a special effect.

As for what the special effect is, few people know about it, because it has not been fully operational since it was built.

Not to mention the purification towers and forts, which are densely packed all over the city.

This well-arranged northern defense line is exactly the confidence of the Sean and them to return to the aid after hearing that the Undead Empire has invaded the south on a large scale, and they still unhurriedly follow their own pace and hit the East China Sea Fleet hard.

Although the Eternal Night Army Leader attaches great importance to this southern invasion of the Undead Empire, from top to bottom, it is far from the level of panic.

At this moment, what the Eternal Night Army leaders and ministers are still thinking about is not simply relying on the northern defense line for defense, but attacking and counterattacking, looking for a way to repel or even defeat them completely.

"Regarding the matter of defense, we have discussed it many times, and I will emphasize the last time here, the magic guide subway is the key to the whole war, as long as we ensure that our magic guide tractor is unimpeded, no matter which point those undead legions choose to attack, they will face our entire garrison army at that time, under normal circumstances, it is definitely not so easy to break the defense. ”

Sean's finger swiped over the line belonging to the magic subway, paused slightly, and continued, "But don't take it lightly, after all, there is an extraordinary existence standing behind them, I don't know if they will use some conventional means beyond our imagination, so before that, we have to test and block them as much as possible!"

And the canopy of the dead has become the first problem for us to stop them.

If we don't find a way to break through their undead canopy, let alone launch a counterattack, our army will go deep into it, and it is very likely that it will become the raw material for them to transform into undead soldiers.

So, I led the craftsmen in our territory to design this chariot!"

Sean waved his hand again, and another holographic projection appeared in front of everyone.

It was a two-wheeled carriage, but instead of a carriage, it was a pillar, similar in shape to the purification tower on the city wall, but in miniature version.

"Is this a mobile purification tower?" Marshal Dicron said, "This is a good idea, when the time comes, take the purification tower deep into the canopy of the dead, not only can it illuminate, but also speed up the recovery speed of the soldiers' light combat skills, and even weaken the combat effectiveness of the undead soldiers, it is really a one-shot count, but I don't know how many of this chariot have been made?"

"Time is a bit rushed, only a hundred of these Holy Light Chariots have been produced in a hurry!" Sean replied, "Once the effect of this chariot on the Undead Canopy is confirmed, the Arsenal can produce it according to the situation, and if it is full force, it will not be difficult to produce a hundred vehicles per month." ”

"Then what are you waiting for?" Marshal Dicron said a little impatiently, "The Guards Legion is the best candidate to test this kind of chariot, it is better to choose a day than to hit the sun, let's set off immediately, and deal a hard blow to their arrogance, let them know that we are not powerless to fight back, and when we move forward, we have some scruples!"

"The front foot of the Guards has just finished fighting on the side of the Danube Plain, and the back foot has been transferred to the Northern Fortress side for repeated battles, and now they have just returned, and they haven't even had time to eat hot food, the Guards Legion has been used too often during this time, and this battle with the Undead Empire, I don't know how long it will last, it's not suitable for them to be in a state of high exhaustion, right?" A trace of hesitation flashed on Sean's face.

"That's why Lord Lord is only suitable to be a lord, not a general!" Marshal Dicron laughed, "Not to mention the Guards Legion, even for the ordinary Legion, what is this rush? ”

"Since the marshal said so, this task is yours!" Sean nodded, not arguing with Marshal Dicron on this.

Sean himself knows that he is really not good at leading troops into battle.

He understands the truth that mercy is not in charge of soldiers and righteousness is not in charge of wealth.

But after so many years of tempering, I still haven't been able to sharpen my heart coldly.

In this regard, not to mention his daughter-in-law, Princess Sophia, even Countess Angie Bena can't compare.

If they were thrown in an ordinary political environment at the same time, Sean would definitely be crushed by them, and he would not know how much he would suffer.

However, this kind of character also has the benefits of this kind of character.

That is, let the marshals and generals below, give full play to their talents, and have no worries.

Especially people like Marshal Dicron are like fish in water, and the more opportunities he is given, the bigger the situation, and the more surprises he brings.