The human counterattack was very smooth, and they quickly cleared out the group of goblins gathered in front of the barbed wire fence. The goblins who were isolated by the shells in the rear could only watch as their companions in front were completely wiped out.
But mortars cannot keep firing. Even though the dwarves added a lot of magic metal when the barrels of these mortars were manufactured, the level of steel in this era still made Lawrence and his group have strict requirements for the weight of the artillery.
Mortars cannot fire continuously in a short period of time.
Therefore, after each cannon fired twenty rounds in a hurry, it had to temporarily stop firing to allow the barrel to cool down. While waiting for the cannon to cool down, a light visible to the naked eye came from the back of the goblin and swept across the battlefield.
All the goblins on the ground, and then the goblins who started to flee regained their courage and rushed forward.
"Large-scale magic." Lawrence recognized what the goblins were doing the moment those lights appeared, and Nora, who was conducting reconnaissance in the air, also saw what had been hidden behind the goblins.
"Brother, the other party has hidden an altar, and it is of a high level." Although relying on the cover of divine power, the goblins successfully moved an altar to a distance despite Lawrence and the others' repeated reconnaissance before the war.
The raid mission was completed very close to the battlefield. However, after the magic was cast, the altar, which was the source of the magic, naturally could not be hidden, and was quickly discovered by Nora who was watching from the sky.
"Do you need me to go over and destroy that altar now? The opponent's altar is hidden among several hills and is guarded by only a few people. If it is a sneak attack, I personally think it is not difficult to take down the altar." Nora immediately noticed the altar.
I contacted Lawrence and asked for instructions.
"There is no need to take risks." Lawrence stopped Nora who was eager to try. "My secret weapon is also ready. It is a good thing to let the group of goblins charge now, so that I can kill them all in one go, so as not to have to do it again later.
Catch the fleeing goblins throughout the forest."
While Lawrence was speaking, a large number of yellow-green bottles with tap water disinfectant written on them in white paint were taken out from the temporary underground warehouse dug out in the settlement and sent to the trenches on the front line. At the same time, another batch of warheads were dyed.
Pairs of yellow-green mortar shells were also sent to the artillery positions.
"Execute the final plan." Knight Lawrence Joseph said as he saw a red flag raised on the second-line trenches and mortar positions at the same time. "I think now is the time, and the wind direction and speed are also suitable."
"You're right." He looked carefully at his own flag on the battlefield, and then looked at the passages protruding from the bodies of the previously fallen goblins all the way forward, across the first trench from the main attack direction on the front battlefield.
The goblin group was getting closer. Knight Joseph immediately gave an order to the messenger behind him. "Send the signal and raise the red flag representing the frontal battlefield."
Soon, a red flag was raised behind the command post. The frontline troop commanders who had been watching the command post immediately blew the copper whistles hanging around their necks when they saw the signal.
Amidst the rapid sound of copper whistles, the batch of flat wooden boxes that had been placed in front of the trench with the words "This is the enemy" on one side exploded one after another. After that, the lids of the wooden boxes were broken, and the steel balls that fanned forward fanned out those boxes.
The goblins not far from the position were swept away. Taking advantage of this gap, the soldiers in the front line trenches retreated to the rear along the traffic line.
When everyone retreated, the goblins whose attack momentum had been knocked down by the directional mines placed in front of the position surged up again like a tide. This time, because the guards in the trenches retreated, they easily rushed to the distance.
The trench is only a dozen or even a few meters long. In some places, some goblins even enthusiastically threw themselves on the barbed wire fence, and then let their companions step on their bodies over the last section of the barbed wire fence and rush into the trench.
"Beep -" there was another fierce whistle, and more than 100 people wearing rubber raincoats and rubber gas masks that looked like pig noses quickly opened the trenches that were placed more than ten meters behind the first trench.
Green cylinders placed on the edge of the second trench.
In an instant, thousands of cylinders released a large amount of yellow-green gas at the same time. Then it spread to the front of the position under the breeze blowing from the sea to the land. At the same time, the mortars also fired the gas that had just been prepared.
The special shells hit the rear of the goblin army, creating patches of yellow-green gas barriers.
After coming into contact with these green gases, the goblins fell in pieces like wheat cut by a sickle. This made Fatina, who was standing next to her, look confused on her face.
"Stinky cloud technique? Throat-locking poisonous gas?" Looking at the fallen goblins, Fatina whispered softly, "How many scrolls should be used to cover the entire battlefield?"
Unlike Lawrence's previous life, people in this world do not have any moral issues with the use of poisonous gases. It's just that because the previous poisonous gases were all related to magic, they could not be widely used in applications.
"This is the power of science and knowledge." Seeing that the overall situation on the battlefield had been decided, Lawrence turned to Fatina with a relaxed expression, "I didn't use any magic scroll, I just bought it from the Federation.
Just 30 tons of chlorine gas.”
After the last typhoid fever outbreak in Eagle Fort, the Federation began to seek solutions to urban water pollution. After all, that attack made the Federation realize that the water supply systems in densely populated areas like cities are shallower than those privately dug in the past.
Water wells are much safer, but they are also prone to large-scale disease transmission.
As a member of the Federal Science Association, Lawrence naturally received a letter of inquiry. After receiving the letter, Lawrence just thought about it briefly and came up with a response plan. This plan is actually very simple, that is, using chlorine to disinfect tap water.
.
After all, this solution had been used for more than 100 years since its invention in the world of his previous life, and it had been used by various waterworks until Lawrence unexpectedly came to this world, so it must have an excellent aspect.
Finally, when Lawrence returned from the Republic of New Zealand, he received a letter from the federal government. The letter stated that his plan was adopted by the federal government because of its low cost and simple operability.
Although at first he was a little worried about how they would get cheap chlorine without electrolysis, he later learned that electrolysis could be replaced by a simple magic, and for the mages, as long as they were busy
The chlorine gas decomposed from the salt water in about an hour can be used by a big city like Eagle Castle for three days.
In addition, the developed steam engine industry can also provide sufficient pressure vessels for the transportation of chlorine gas. Therefore, as long as a few mages are hired to establish a chlorine production factory on the seaside, the chlorine gas can be easily transported to major cities via railways.
It is also much more versatile than other methods.
Therefore, when Lawrence received the title of earl, the new technology of chlorine disinfection had already begun to become popular in major cities along the coast of the White Eagle Federation, and was rapidly spreading to inland cities.
And it was under this circumstance that Lawrence successfully obtained 30 tons of chlorine gas to create a batch of steel cylinders and special bombs for use. They had been transported by Saphiel's ship before, and they were all used on the battlefield today.
superior.
Now it seems that the first use of this poisonous gas was very effective. As the gas continued to spread to the group of goblins, most of the goblins whose physical fitness was not as good as humans died quickly. A few bugbears were mixed with ordinary goblins.
, although the hobgoblins and, after all, the extraordinary beings were able to withstand the poisonous gas attack on them, their scattered approach towards the two trenches only resulted in the deaths of the defenders who were waiting for them.