After the large-scale scout operation of the demons five days ago, although there were continuous skirmishes, there were no major actions.

Moreover, the elite team sent by Ye Zhen in the past few days did not get any useful information, so Liu Feng, as a staff officer, began to do his homework in other aspects.

Judging by his red eyes, he must have been sleepless for days.

"My lord, take a closer look at the memorabilia of these demon battlefields found by your subordinates. Liu Feng handed Ye Zhen a page of notes.

Ye Zhen followed Liu Feng's point and looked down, and all the records recorded on it were the records of the great battles in the human and demon battlefield within 10,000 years.

This kind of record, no matter where it is, is not a secret, but Liu Feng has studied it very carefully here, and replaced the large anniversary table used to record time with a pure time interval.

Nine hundred and fifty-seven years ago, the demons launched a massive military operation without warning, launching large-scale attacks on the northern and southern theaters respectively.

In the battle, only the demons mobilized more than eight million troops, and more than four million soldiers were killed on both sides.

Two thousand and two years ago, after a series of reconnaissance, the demon clan launched a key attack on the western theater, and the southern and northern theaters also had heavy troops to contain them, and the troops involved in the war on both sides exceeded 20 million, and more than 4 million were killed.

Three thousand two hundred and forty-four years ago......

Four thousand six hundred and twenty-five years ago......

Liu Feng's list was very detailed, and gradually, Ye Zhen also saw a pattern, and the melancholy in his eyes became stronger and stronger.

"Great Marshal, according to the age of the great war verified by his subordinates, basically, the demon clan will definitely launch a large-scale attack every eight hundred years or at most three or four hundred years.

And the number of casualties in each battle is more than four million.

And now, it has been nine hundred and twenty-seven years since the last time the Demon Race launched a major war of this magnitude, that is to say, in the future, the Demon Race is very likely to launch a large-scale battle with more than 20 million troops invested by both sides and more than 4 million killed!" Liu Feng analyzed.

Ye Zhen's face changed suddenly.

This level of combat is absolutely terrifying, and this level of fighting, the disappearance of the formation of troops, has become commonplace.

If it is really possible, then the situation of the Beihai Tianlang Army will be very dangerous.

"How sure are you?" Ye Zhen asked.

"This ......" Liu Feng was a little unsure, "Great Shuai, the time span of each time the demon clan launches this kind of thousand-year battle is very large, the shortest one is more than eight hundred years, and the longest interval is as high as fourteen hundred years.

At present, the subordinates can only conclude that the Demon Clan will definitely launch a thousand-year battle in the next five hundred years at most!" Liu Feng said.

"Five hundred years in the future!" Ye Zhen smiled bitterly, this inference is useful, but at this point in time, it is the same as not saying.

"My lord, this time period is indeed a bit long, but every day in the next five hundred years is possible, and, judging from the law of the previous millennium battles, when the interval between each battle reaches the maximum, this interval will become shorter and shorter.

The subordinates are awake, maybe soon. ”

Ye Zhen groaned.

Judging from the data compiled by Liu Feng, Ye Zhenjue's and Liu Feng's laws inferred that the interval between the last millennium battle and the last millennium campaign was one thousand and forty-five years.

Then the time interval of this millennium campaign will definitely be shorter than 1,045 years.

So far, 957 years have passed since the last Millennium Campaign, and this Millennium Campaign will definitely take place in the next 88 years.

Moreover, according to Liu Feng's research, the time of the millennium battle this time will definitely be ahead in the next 88 years.

Because of the difference in time between each thousand-year battle, there is at least one Jiazi sixty years.

In other words, according to Liu Feng's inference, in the next twenty-eight years, there will be a thousand-year battle.

And Ye Zhen's Beihai Tianlang Army has just taken turns to defend the battlefield of humans and demons, and there are at least ten years left.

Then, the possibility of encountering this thousand-year battle is infinite.

Even if it is inferred in advance, all Ye Zhen and Ye Zhen's Beihai Tianlang Army can do is to prepare more in advance, and they can't quit or escape at all.

However, this kind of preparation in advance, relying only on Ye Zhen's Beihai Tianlang Army, is useless.

This kind of large-scale mobilization and preparation must be the supreme commander of the human and demon battlefield, and most of the capital governors Ji Yuan can make it.

Even if it is approved by Ni Feng, the governor of the Northern Theater of Operations, it is not of much use.

And if you want the Metropolitan Governor Ji Yuan to believe this inference, it is useless to rely on Liu Feng's notes and inferences alone.

Not to mention that it is impossible for the Metropolitan Governor Ji Yuan to believe Ye Zhen himself, this kind of early mobilization, the consumption of materials and manpower will be an astronomical amount, and no one dares to move lightly.

But Ye Zhen was in a hurry.

There must be accurate information!

Because in this case, if he does not prepare, then the possibility of his Beihai Tianlang Army being annihilated in this thousand-year battle is very great.

"Liu Feng, you say, what is the purpose of the demon clan to launch this thousand-year campaign?" Ye Zhen suddenly asked abruptly.

"Purpose?" Liu Feng was a little puzzled.

"Yes, every war has a reason, and it has a clear goal and direction! So what is the goal of this demon race, which has continued to launch this thousand-year campaign for tens of thousands of years?

Or rather, what is it for?" Ye Zhen asked.

This question made Liu Feng fall into hard thought.

After a while, Liu Feng raised his head and smiled bitterly, "My lord, there is no such thing in all the records, and there is no way for the subordinates to speculate why the demon clan has been waging a thousand-year campaign for tens of thousands of years.

Perhaps, this is the nature of the early demons!

The demons are aggressive and bloody by nature, and in their eyes, the human race is food, a natural treasure to improve cultivation and spiritual intelligence, maybe it's this!"

"Nature?"

Ye Zhen pondered.

After a long time, Ye Zhen raised his head and let out a long breath, "Let's call it nature." Then, Ye Zhen's face turned grim, and he immediately issued a series of orders.

"Check, Liu Feng, do your best to trace it up, I need you to make this inference a little more detailed and powerful. Ye Zhen made a decision immediately.

After Liu Feng received the order to leave, Ye Zhen immediately sent a more elite team, so that Brother Monkey Sun Ba and Zhu Hong took an elite team composed of powerful Sky Survey God Hunters to cross the defense line, go deep into the demon defense line, and capture the higher-level demon generals.

To be honest, this action is extremely dangerous.

Once the traces are leaked, what awaits this team may be a catastrophe.

Even if Brother Monkey Sun Ba's combat power is amazing, but on this front line, the Dao realm is not uncommon.

For this reason, Ye Zhen deliberately sent the Cloud Wing Tiger King kitten and the big-eared Nie Ting, and with the big-eared Nie Ting's heavenly sound supernatural powers, he thought that he could avoid possible dangers to a greater extent.

After sending this elite team, Ye Zhen was not idle.

began to take his personal guards to investigate the terrain of the entire Blood River Fortress step by step, whether it was heaven or earth.

Although it is said that there has long been an incomparably detailed spiritual map of the entire defense area of the Blood River Fortress made by the ground division in the army, in the eyes of Ye Zhen, who has been the commander of the Eastern Expedition, it is very necessary for a commander to investigate every terrain on the spot when there is time.

Maybe some subtle terrain can affect the direction of the battle.

For the next period of time, Ye Zhen silently checked all the terrain.

Including the direction of the leylines underground, and even the origin of the blood river flowing across the Blood River Fortress, at the bottom of the river, Ye Zhen checked it clearly.

Time passed, and just when Ye Zhen was surveying the terrain around the entire Blood River Fortress Defense Area, he received news from Sun Ba and others.

This elite team has succeeded!

A total of four high-level demons were captured, three were demon lords of the Xuangong realm, and one was a demon lord with a high status in the realm king realm.

I have successfully taken these tongues back to the Blood River Fortress!