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The joint assassination by Bathory and Mary did not bring any impact to the situation in the Tang Empire and the Second World, not even a ripple.

No one in the remaining five states on the Roseside continent cared why Bathory, who had just been appointed as the ruler of Estabon, was executed by slow slicing after the celebration. Not to mention, they had no idea that a dark dragon knight had tried to assassinate Zhang Wei.

They have their troubles.

After the celebration of Estabang, Zhang He's army began to attack Tiesenbang, while Liu Rengui's fleet began to attack the coastline of Mantabang. The elves were no longer invincible because the Tang Empire's air force had upgraded its armor and magic defense shield to version 3.0.

The Tang Empire's air force was no longer slaughtered one-sidedly by the elves. Instead, it could fight back and forth with the elves, causing the casualties of the elven expeditionary force to continue to increase.

The night before Tiesen City was surrounded by Zhang He's army, the elven expeditionary force abandoned Tiesen State. They did not move to Manta State in the northeast, but instead went northwest through the mountains to Xida State, where they were preparing for the final battle. If they were still defeated, they might have to follow their navy back to the elves' territory.

The siege of Tiesen City was more intense than that of Estabon, because the elves enchanted the giant crossbows of Tiesen City before leaving. In order to use the enchanted giant crossbows, Tiesen City specially converted the artillery into a crossbow platform.

When the Tang Empire's air force and army faced these huge enchanted crossbows, they were like ordinary infantry encountering enemy artillery shells. They were simply unable to defend themselves with magic shields and their own armor.

In the later stages of the battle, both sides were almost blood-thirsty. It was not until Tiesen City used up the last giant enchanted crossbow arrow that the Tang Empire Air Force, which suffered heavy losses, regained air superiority. Zhang He's revenge was also very direct. He rejected Tiesen City's surrender application and directly ordered his troops to launch a revenge attack to raze Tiesen City to the ground.

Liu Rengui's fleet also suffered losses because of the giant crossbows enchanted by the elves. Those huge enchanted crossbows could easily tear apart the magic circle generated by the magic circle, and then pierce through the powerful battleships.

Some battleships were even shot through the bottom by the enemy's giant crossbow arrows at an oblique angle. Despite the crew's best efforts to repair them, the battleships still sank due to the giant crossbow arrows that kept coming in at an oblique angle.

Fortunately, Liu Rengui used the air force on the aircraft carrier to reverse the situation. After losing a lot of warships, he finally defeated the enemy fleet.

Due to the effect of the giant enchanted crossbow arrows, the elves who were preparing to evacuate in Manta and Mohedai did not follow the order to reunite in Hida. Instead, they stayed to cooperate with the local human army to increase the output of giant enchanted crossbow arrows.

The losses in the Tiesenbang battle and the battle that forced Liu Rengui to temporarily withdraw for retirement caused the Tang Empire to once again change the direction of its military weapons research and development. Zhang Wei asked the Ministry of Magic Technology to put the research and development of tanks and ironclad ships on the agenda, as well as the research and development and mass production of long-range artillery.

The Tang Empire and the Holy Alliance, which existed in name only, once again tacitly entered into a state of confrontation.

The Holy Alliance once thought about letting the elves enchant firearms so as to avoid going backwards in history. However, after practice, the elves could only enchant arrows. The Holy Alliance also thought about making wooden shells and bullets to exploit loopholes in the rules of the world, but it turned out to be not feasible.

As a result, the Holy Alliance began to vigorously develop bows and crossbows, and tried to make them as large as possible so that they could use more powerful elven enchanted arrows.

In order to counter the elves' enchanted arrows, the Tang Empire began to research tanks, ironclad ships, long-range artillery and semi-automatic rifles, trying to modernize its troops as much as possible, as Zhang Wei understood.

As the first experimental tank rolled off the factory, Zhang Wei changed the Tang Empire's reign title to Yitong to celebrate this magic-powered tank.

Three years after the unification, tanks began to enter mass production, the first ironclad ship was launched, and long-range artillery solved the problem of transportation.

In the sixth year of the unification, ironclad ships entered mass production. The Tang Empire transported a tank regiment with 12 tanks as a tank company to Xintie City (formerly Tiesen City), preparing to continue the attack on Manta Fort in the northeast.

The first battle between the two sides took place in the town of Kroni in Manta State. As the gateway to Manta State, it has been built into a military fortress by Manta State. It was also because the goddesses were partial to it that they increased the output and types of ancient tombs in each main city, allowing each main city to be self-sufficient and not lose the opportunity to prepare for war due to poor economy.

The appearance of the tank regiment really scared the defenders. It was the first time they had seen this kind of iron shell. The defending commander suppressed his panic and asked the officers and soldiers to wait until the enemy's iron shell entered the range of the giant crossbow before attacking.

Before the tanks could show their skills, long-range artillery began to show its power. A large number of shells with various lights flew in arcs towards the town of Croni. The accuracy of these shells was not very good, but after each shell landed, different types of explosions would occur due to the different attached magic.

These explosions were terrifying both to hear and to see, but due to poor accuracy, many shells failed to hit the town. Some shells even passed over the northern part of the town and landed on the ground to the north.

It is obvious that the artillery of the Tang Empire also knew that the accuracy of this cannon was poor, and they were afraid of accidental injuries, so they raised the muzzle.

"Why is there no air force?" a defending soldier asked curiously.

"Stop talking nonsense!!!" The old soldier next to him was about to silence the soldier when he saw a group of black spots on the horizon growing bigger and bigger.

"Air Force! Air Force!" Because only the Tang Empire had an air force, it was easy for the defenders to give the warning. Most of the giant crossbows that were originally aimed at the iron shell began to adjust their aiming direction under the commander's order, preparing to launch an attack on the Tang Empire's air force.

As the battle progressed, most of the defenders' attention was attracted by the Tang Empire's air force, and few people paid attention to the slow-moving iron shell.

"Enemy, approach, fire!" A sergeant gave the order to shoot at the tank. A giant crossbow arrow with light shot towards the tank. The giant crossbow arrow just hit the tank's track. The tank was paralyzed instantly. Seeing this, the sergeant thought that this iron shell was just fooling people, so he ordered the messenger to inform the commander of the information that the first shot hit.

Little did they know that it was because of this underestimation of the enemy's intelligence that the defending commander made a wrong decision. He put more giant crossbows into the battle with the Tang Empire Air Force, but ignored the slowly approaching tank regiment and the Tang Empire infantry approaching behind the tanks.