Plague was a vague concept. In the history of mankind, there had been many large scale outbreaks of plague. Some plagues had almost destroyed an entire country. With the development of human civilization, it was able to control and cure some pestilences, but it also allowed more types of pestilence to become popular.

The most common type of plague is influenza, once smallpox, plague, yellow fever, SARS...

All of this was caused by the plague, which was caused by bacteria and viruses. Since ancient times, people had always talked about how deadly the plague was because it could quickly spread through a large area. During the planet era, there was no lack of bacteria and viruses that could cure diseases. The diseases caused by these viruses were not something that the Tianyuan Kingdom could control and treat during this era.

Within the Rising Sun Empire military camp, Yun Zihuang was spreading a virus that spread rapidly through the planet era. However, it would not cause too much death in a short period of time, but would cause people infected with the virus to become weak and fall ill very quickly.

She could easily control this virus and treat people who were infected with it.

This was a plan she had made before she had come to Black Bear Gap, and only she knew of it. Facing the two hundred thousand strong army from the Northern Region and the Rising Sun Empire, the five thousand Iron Guards led by Feng Qingxiao, along with her one thousand personal guards, still numbered six thousand. Even though Feng Qingxiao was the Battle God King, she had over ten thousand years of military talent. In the era of cold weapons, the number of soldiers was the key to victory.

With ten times the enemy, there was still a way to win. Twenty times the enemy, even if he won the final victory, he would definitely suffer heavy losses.

Facing forty times the enemy's strength, with no food or reinforcements, no matter how talented Feng Qingxiao and she are in military matters, they are not gods. Not to mention destroying two hundred thousand soldiers, it would be extremely difficult for them to escape." The Black Bear Ditch had been under siege for a long time. Indeed, the Iron Guard had killed and wounded tens of thousands of enemies. However, out of the six thousand people here, only a little more than a thousand remained.

Spread the virus. This was Yun Zihuang's plan, and also her ultimate killing move!

The reason why he pretended to be a barbarian princess was to spread the virus in the Sunrise Kingdom. Similarly, during this period of time, he not only wanted to obtain the necessary materials to maintain his army, but he also wanted to eliminate the enemy effectively and spread the virus.

This plan had finally shown great effect. However, it was not the end. Rather, it was a new beginning.

Duke Ba Tian's face was gloomy: "Now that the military's plague has been controlled, it is no longer spreading, and the soldiers with lesser illnesses are also getting better. The war horses have also been restored in large batches, but the matter will never be so simple. The Battle God King and Princess Taiping will not be able to cure all the soldiers in the Ascending Sun Empire so easily. "

"The Grand Duke is worried. What other sinister methods does Princess Taiping have?"

The Grand Duke nodded. "Exactly. Even if this Grand Duke captures the Eldest Prince and Ninth Prince of the Northlands and kills a hundred thousand of their soldiers, the Battle God King will not let go of the Ascension Empire."

He smiled bitterly. "If the barbarians of the northern region weren't here …" "Sigh …"

Duke Ba Tian heaved a long sigh. If it was him, he wouldn't miss such a good opportunity. He would definitely take this opportunity to maximize the benefits!

A certain general's face was filled with ruthlessness, "If that's the case, why don't we..."

His hand descended harshly, making a slashing gesture. The Grand Duke sneered, "Do you want my Rising Sun Empire's 100,000 soldiers to be buried with the War God King and Princess Taiping?"

He thought that once Princess Taiping controlled the plague and cured the soldiers of the Rising Sun Empire, they could kill or capture these two people while the War God King and Princess Taiping were in his military camp. When that time came, the entire Tianyuan Kingdom would be his!

But why would the War God give him the slightest chance?

The young and beautiful princess of Pingping frankly told him that the plague was only temporarily controlling itself and would not spread further. The soldiers who had gotten better were also in danger of their lives.

This was a blatant threat!

However, he had no choice but to endure and accept this threat!

On the battlefield, Battle and his men all kept their distance from the soldiers of the Rising Sun Empire, unwilling to approach them. Although he wasn't sure what was going on with the Rising Sun Empire's military camp, his intuition told him that something was off. The military doctors sent to help the Rising Sun Empire seemed to have disappeared without a trace. To this, Duke Ba Tian could only say that the military doctors were busy gathering herbs to treat the soldiers, but did not let one leave.

As for the illness of the Rising Sun Empire's military camp, Bartle was unable to investigate it further.

During this time, there were always accidents at the back. It was said that a group of light cavalry soldiers of the barbarian race was running amok at the back. Some time ago, they had even burnt a large amount of transport materials.

He suspected that those people were, were the Iron Guards pretending to be, but there was no conclusive evidence or news about them.

"Ninth Prince, since we're cooperating, let's be honest. Amongst the princes of the northern region, the ninth prince was the wisest and most valiant. However, the Barbarian King didn't pay much attention to him. In Black Bear Valley this time, the First Prince has also made things difficult for the Ninth Prince. In our cooperation, besides the First Prince, the military power will be controlled by the Ninth Prince.

Bartle smirked, and with a smile that was not a smile, he said, "Losses will be lost. Father will be conferred the title of the 'King' and he will die in battle in Black Bear Valley. Does the Grand Duke think that he will have a chance of survival after I return?"

Duke Ba Tian was also smiling, his face full of sincerity: "Why would the Ninth Prince want to go back? The area was vast, and as long as the ninth prince made a lot of meritorious services and gathered enough troops, even the Barbarian King would not be able to deal with the ninth prince. I heard that the Barbarian King is very old and that the War God is here to hold back both your armies of two hundred thousand. I'm afraid that the situation with the Barbarian King is not looking good right now.

Bartheel's amber eyes flashed with the luster of a wild beast, "The grand duke first allied with us from the Northern Region, but then secretly had an affair with the War God King. He sneakily attacked our Northern Region, causing us countless injuries. Now that we have protected the War God King and Princess Taiping and are here to discuss cooperation, does the War God know that the grand duke is doing this? "

The Duke was startled. How secretive was the War God's situation in his military camp? He didn't expect that the barbarians of the northern region would know about it.

"Don't listen to the rumors, Ninth Prince. I've been raiding the northern military camps, but I've never tried to attack you. "If the first prince is left here, he will be in charge of everything, and the military power will be in the hands of the first prince. How can the ninth prince sincerely form an alliance with me?"

Duke Ba Tian urged his horse a little closer, and Battle took precautions to retreat, maintaining a distance from the Duke. He wasn't worried about being ambushed by the Duke, but was afraid that the disease in the Rising Sun Empire military camp would be contagious.

The Grand Duke said a few words in a low voice, and the light in Battle's eyes flickered indeterminately, while a boundless ruthlessness flashed in the depths of his eyes.