The next day, the three-pounder cannon that had been newly made yesterday with a boring machine was tested. The barrel was fixed directly on the iron pier, and 350 iron ball shells were fired in a row, and the barrel began to crack, and after cracks appeared, Li Jing decisively ordered to stop the experiment, and it seems that after heating and forging, the bronze barrel can also greatly improve the durability.

Li Jing suddenly had a whim, and remembered the water casing heat dissipation method of the Makqin heavy machine gun, as long as there is water, you can shoot as many bullets as you want. Therefore, it was proposed to wrap the three-pounder gun with a 0.2 mm steel plate and fill it with water in the middle to solve the problem of overheated barrel cracking. The irrigation inlet should be made as large as possible, and in the battle in Liaodong, you can open the lid in an emergency, shovel the ice and snow and pour it directly. During World War I, Russia's Maxim heavy machine guns were designed in this way, and liquid water was difficult to find in the alpine regions. I'm in a hurry, so I can only pee inside.

Although the thermal conductivity of bronze is not as good as that of steel pipes, the effect is still very good, and a new barrel was processed that night, and after the water casing was installed, the weight increase was limited, and the casing could be removed and transported separately during transportation. Water can be poured back in during the battle. Thousands of rounds were fired that night, and there were no problems, but a large amount of evaporated water vapor and gunpowder smoke affected the line of sight.

Li Jing went to bed after making the suggestion, and the next morning Wang Laosan and others came to report with red eyes, and fired more than 1,000 rounds at night, and in the morning the casing was removed and found that the barrel was intact.

Li Jing handed over to them the drawings of a variety of gun mounts that he had designed, and asked them to refer to them, the total weight of the three-pound gun could be easily controlled within 250 kilograms, and the gun carriage, gun wheel, and gun barrel could be disassembled and carried on people's backs and shoulders, and it was very convenient for animals to carry them.

This cannon was the most commonly used in the American Revolution. The so-called three-pounder cannon hit a country. Washington/Stanton led the American militia, using easily carried three-pounder guns, to bombard enemy fortifications and enemy infantry phalanxes until the final victory.

The advantage of this gun is that it has a low weight, it can be easily carried, especially for mountain combat, which is very convenient. Although the range is only 365 meters, this range is better than all bows, crossbows/bows, and muskets. It can fire solid iron balls to attack city gates and earthen walls, as well as shotguns and chain bullets to kill infantry and cavalry.

Jiannu's elite white fangs with three layers of armor may be able to block the lead bullets of the brown bass flintlock pistol from a hundred meters away, but they will definitely not be able to block the iron ball shells of the three-pounder cannon, even grape bullets, chain bullets, and even shotguns. The shield car will also penetrate within 200 meters. Jiannu wanted to push the shield cart to within fifty meters and shoot at him, but he had no chance at all, this kind of heavy shield cart had already been broken to pieces by a three-pounder cannon when he waited for this distance on the muddy road in eastern Liaodong.

Due to its light weight, it can also be equipped in large quantities on inland river vessels.

Due to the tight schedule, it was too late to build a professional river warship. Li Jing plans to make simple modifications to the existing inland river boats. Armor with thin steel plates on the side and canopy with thin steel plates. The propeller driven by a human-powered bicycle is used for power. The armament was equipped with such three-pounder guns and Furlong cannons of less than 500 pounds. The maximum firing range of the Franc cannon can reach 500 to 600 meters. However, the shells are less powerful and less accurate. For long-range shooting, this three-pounder gun was used at close range. On the river is enough to destroy all the river boats.

At present, the rebellion of luxury in Sichuan is imminent, and Li Jing's second batch of immigration plans are plans to immigrate from Sichuan to Dayuan Island, so Li Jing must master the control of the sea on the Yangtze River. Even tributaries of the upper reaches of the Sichuan River, such as the Jinsha River, are preparing to transform a suitable fleet of inland river warships on existing wooden boats.

Li Jing will use the existing wooden boats on the Yangtze River to transform a fleet of armed forces that absolutely crush everything. Without Li Jing's consent, the board was not allowed to cross the Yangtze River.

There is no way to change it in the north, no one can change it, and this ice age will last about 30 years, and solar activity will decrease by 7 percent. The situation will get worse every year. The drought will even spread to Jiangnan.

What Li Jing could do was to blockade the Yangtze River, never allow Liukou and Jiannu to cross the river, and keep half of the prosperous Jiangnan. Quietly wait for the drought, plague, and turmoil in the north to pass.

At the same time, he participated in the wars in the northwest, north China, and eastern Liaodong, and emigrated the population that could not be supported in the north to the south.

In the second year of Chongzhen's martyrdom, the temperature finally began to rise, and the climate gradually returned to normal levels in the Shunzhi Dynasty. The Qing Dynasty finally sat firm.

According to different statistics, the largest estimate of the population at the end of the Ming Dynasty was 195 million, the lowest estimate was around 100 million, and the Cambridge History of China estimated the population at about 150 million.

By the seventeenth year of Kangxi, the registered population was only 19.5 million. In between, ninety percent of the population was lost according to the highest estimates. There is almost not one in ten people.

These losses of population in the north of the Yangtze River are mainly caused by war, plague and drought. The smallpox plague ravaged in turns, from Beijing to the Huai River, infecting nine out of ten households, and the entire village died.

The Jiangnan region has been hit by catastrophic floods many times in the Tianqi Dynasty, and production has been reduced or extinct for many years. In the later period, the massacre of the Qing army in the south and the war in the pacification of the south also lost a large number of people, and the rebellion of the three feudatories in the later period was even worse, affecting most of the country and greatly reducing the population again.

Li Jing planned to control the man-made disaster north of the Yangtze River. The areas south of the Yangtze River have adopted various methods to concentrate their efforts on dealing with floods and drought in some areas. At least the population of Jiangnan should be no less than 60 million.

Beginning this year, from Dayuan Island, Kalimantan Island, Sumatra Island, and the entire Indochina Peninsula, we will begin to gradually establish settlements, with the port as the center, build watchtowers and fortresses, and gradually migrate to develop paddy fields. Gradually encroach and occupy the areas most suitable for agriculture.

If the South Sea Islands cannot be settled, they will continue to migrate to Australia. It was enough to accommodate all the people of the Ming Dynasty.

The biggest advantage of this three-pounder gun is that it can be disassembled and carried on the shoulders of a person, and it can be equipped with cavalry units and mountain troops. It is used for operations in complex terrain. Fighting in the mountains in the upper reaches of the Yangtze River would give Li Jing's army a great advantage. The southwestern Sichuan horses are short and long, and the three-pounder cannon is lightweight, so it can be towed and disassembled and carried.

Three-pounder infantry can be equipped to a sentry (equivalent to a company). Each post can be equipped with two, pushed by infantry to advance along the line of formation, due to the high rate of fire, two rounds a minute, can reach the rate of fire of the arquebus of this era, but the power and range are better than the arquebus. As long as the ammunition can keep up, it can be used to destroy all shield carts, infantry, and cavalry in front of you.

As for how to suppress the enemy's large artillery, it was handed over to the six-pounder and twelve-pounder guns of the battalion's artillery posts. After the enemy forces were dispersed, the battalion's cavalry posts were responsible for the pursuit. Now there are only three posts in each battalion, lacking a cavalry post and an artillery post, this part of Li Jing is ready to be made up after the battle of Liaodong, and can only temporarily add an infantry artillery team to the infantry post Two three-pounder guns to make up for it.

Originally, it was planned that each battalion would also have 300 auxiliaries, equipped with cold weapons and sapper shovels, to be responsible for logistics and work. Recruitment is currently underway. Li Jing fought for 100 men in each battalion before the start of the march.

Li Jing finally decided to give priority to the production of this three-pounder gun, and the gun carriage was studied by the Gun and Artillery Department, and finally selected the gun mount structure that Li Jing copied from the American Revolutionary War three-pounder gun. However, due to the use of bronze plus who casing for the barrel, the weight was increased, and the total weight eventually increased from one hundred and seventy kilograms to one hundred and eighty kilograms.

In this way, Li Jing's ten battalions, a total of thirty sentry posts, needed sixty three-pounder guns. Each outpost is required to form an infantry artillery team in addition to the original three teams (30 men each). Armed with two three-pounder guns, one for each cannon, ten men were responsible for carrying the three-pounder guns and ammunition. The infantry artillery corps was composed of only two shes.

Together with the four captains and six individuals of the sentry department (one sentry commander, one medic, two communication soldiers, one treasurer, and one clerk), there are exactly one hundred and twenty people. Ten battalions required an additional six hundred and thirty artillery recruits.

Li Jing now has no shortage of platform coins, and directly purchased seven hundred artillery biochemical officers. Now it is used as a gunner, and later as an officer and instructor as the unit expands. The army used 630 people, and the remaining 70 people were arranged to set up an artillery department in the South Australian Maritime Academy for use as instructors.

When fighting, each battalion is an independent combat unit, with three outposts arranged in parallel, which can also be arranged in a triangle when surrounded. Each post is arranged in three rows in three teams to form a three-section firing pattern. Each outpost had thirty brown bass flintlock pistols on the front, and two three-pounder guns, which could be placed in front of the array.

In fact, among Li Jing's army units, the auxiliary soldiers have the lowest salary, the most arduous work, and the most complicated tasks. When used by the sappers, they were responsible for digging trenches, constructing breastwalls, laying out barbed wire, and throwing sama nails (triangular pyramids, a military type of iron spike that spreads obstacles). Also known as tribulus terrestris. There are 4 iron thorns stretched out, several inches long, where the ground must have a thorn facing upward, the tip of the thorn is like the herbaceous plant "tribulus terrestris", hence the name. In warfare, thistles are scattered on the ground to delay enemy movements. ）。

When the sword and shield soldiers were used, a large shield with a thin steel plate with wheels was used to cover the battalion soldiers in wartime, and when the grenadiers were used, grenades were thrown in turn. It is responsible for setting up the tent when camping, and protecting and transporting the baggage during transportation. When used as a cook, he also had to cook and deliver food, and fetch water to boil water. When used by medics, the battalion also has to cooperate with the military doctor to treat the wounded and dispose of the corpses.

In the future, all those who want to join Li Jing's army must start as auxiliaries, and then supplement the battalion troops.

Li Jing had high hopes for the three-pounder cannon, since Huasheng/Don led the North American militia to use it to fight a world hegemon. He also hopes to use it to save this hopeless Ming.