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The sky is blue and the sea is clear.

Qin Jun stood on the deck of Taiping, looking at this bay that was more beautiful than Jiaozhou Bay. He had not been here for a long time, but he had already fallen in love with it.

There were hundreds of people walking on the Taiping. This ship was an armed merchant ship under Qin Jun's name. It was twenty meters long and thirteen meters high. It had three large masts and seven sails. It not only had a pole, but also a small stone cannon, a turret cabinet and twelve mortar cannons.

This is a standard ship of three thousand materials.

Materials are the general calculation unit for shipbuilding in ancient times. The imperial court customs taxation also calculates ships based on materials. Materials mainly refer to the volume of the ship, calculated based on the length, width and depth parameters. The imperial court ship taxation is several lengths, several widths, and several hatches. The material is calculated and the force is better.

It is to calculate the volume of the ship based on the length, width and depth of the ship, and then calculate the number of materials and load capacity. The force is the load capacity of the ship.

Therefore, the Tang people had a relatively complete set of calculation formulas. Basically, each hundred materials were about one cubic abbot, and one material was about to be converted into a displacement of 0.33 tons.

For example, a 800-meal river boat with a total length of 800 meters and a width of 2 zhang, and the cabin depth is unknown. Using the production ratio of this type of ship, the width and depth ratio can be used to estimate that the cabin depth is about 7 feet. Multiplying the three to 8.13 cubic cubes, taking the integer of about 800 materials.

The displacement is nearly 300 tons.

The Taiping is a heavy ocean-mounted merchant ship in Qinjiabao's ship. It is a standard three thousand material ship with a displacement of nearly one thousand tons. In this era, this is indeed a marine giant.

Although there are giant magnolia boats carrying tens of thousands of stones on the Yangtze River, the boats that are only in the inland rivers and can only run under the Yangtze River. The largest sea boats that the imperial court has built are angel ships, and they are ordered to patrol Linyi, Goguryeo, Baekje, Silla, and Japan. They usually carry envoys of the imperial court. They rode on the throne when they were enthroned by the new king of the vassal states to show their national strength and promote their national prestige.

This kind of seal ship is fifteen zhang long, three zhang wide, and ten zhang deep. There are several floors on the deck that have not been included in the depth. These ships are standard 4,000-foot ships with a full load displacement of 1,300 tons.

It is actually relatively simple to convert material into water displacement, because one hundred materials are one cubic cubes equal to 32.8 cubic meters, so one material is zero 33 cubic meters, and a thousand materials are about 330 tons of water displacement.

How big is the displacement of 1,300 tons?

The escort helm of My Rabbit Type 65 is only 1,200 tons, which is a warship of later generations. The latest large-scale transport is only 1,000 tons, and it is already world-class.

In this era more than a thousand years ago, the boats running on the sea were smaller than those inland rivers, and the deep seas were often smaller than those near the seas. They were all because the wind and waves were bigger, and the boats were not easy to resist wind and waves.

The Qin family’s treasure ship is considered a pioneer in epoch-making.

In history, Magellan successfully returned to Spain to the Greater Garen of Victoria, which had only 500 tons of water displacement. In the Age of Discovery, Britain, Spain, Portuguese and others established powerful navies, and ships continued to increase, and 2,000 tons of 3,000 tons or even 5,000 tons of things were continuously built.

But in this era, the Qin family's treasure ships have dominated the sea and are far ahead.

Other people's sea boats are not afraid to build too big, and they are afraid of wind and waves, but the Qin family's ship can be built very big. The bigger the ship, the more it can resist wind and waves and increase transportation volume. There are too many advanced technologies on the Qin family's ship.

Just one splicing keel technology saves a lot of cost of shipbuilding.

The Taiping has a multi-layer deck and a large number of cabins. It not only can carry more cargo, but also has comfortable living space for crew sailors. Not to mention, this is an armed merchant ship, which has the firepower that can roam at sea.

I am not afraid of those pirates' boats at all.

This boat was a birthday gift given to Qin Lang when he was sixteen years old, and it can bring great benefits to Qin Jun every year.

There is also a ship ahead of Taiping, but it is Wu'an. It is a flexible and fast frigate of 1,500 materials. Although the load capacity is all as good as that of Taiping, it focuses more on speed.

The two ships sailed in the bay one by one and one by one, and according to the speed unit used by the Qinjiabao Ship, it reached ten knots.

From San Francisco Harbour to Dragonstone Island, it is only thirty miles away, and it has arrived in less than half an hour. The speed is amazingly fast.

Longkou Port Pier, Longshi Island.

Cunxian Cunen had already discovered their arrival and came to greet him in person.

In Longkou Harbor, the Martial Arts and Sailor Department ships came forward to greet them, and after confirming their identity, they personally guided them into the port.

Qin Jun got ashore and handed over the letter written by his father on the almanac to his two righteous brothers.

Qin Cunen was wearing red military uniforms and the words "Longshidao Martial Arts Hall" on his chest. He looked at it carefully with a solemn expression and then handed it over to Cunxian.

Cun'en's uniform is straight and clean, and even his beard has been carefully modified. The beard on his chin is like a flat brush.

After reading it, Cunxian talked softly with Cunen for a while.

"We gather immediately and prepare to set off."

Qin Jun asked, “Where to go?”

"Dalang doesn't know yet?"

"I haven't read the letter."

"The first order was to order the teachers and students of the martial arts lecture hall to form a student army and take them out for actual combat. Dalang went with us, and there were also some knights from Wu'an who came to visit."

Qin Jun then realized, but he was immediately excited.

"Where to go for actual combat?"

"After more than 100 miles southwest of ours, there is an estuary of the Great River called Nasugbu. This river basin is a good plain, with many natives around it, and there is a good Tianliang Harbor at the mouth of the river."

Qin Lang asked the martial arts lecture hall to go to actual combat and train troops, and also carried out mobile tactics against the natives. Since the natives gathered to attack New San Francisco, Qin Lang defended the city while sending troops to take advantage of the sea shipping advantages to go around them to attack them.

This is a tactic of cutting off firewood from the bottom of the pot.

Qin Jun was very excited to hear it.

The mobilization of the martial arts lecture hall was very fast and all the staff were dispatched.

Longshi Island was originally a peninsula with a small area. It turned out that there were some native tribes. After the martial arts lecture hall arrived, with the help of Qin Lang Guard, they launched an attack on the natives on the island.

The students of the martial arts lecture hall grew up quickly through more than a dozen wars, defeated all the natives, captured or drove them, completely occupied Longshi Island, and established a martial arts lecture hall campus on the island, and began to reclaim wasteland and farmland.

Many students sent letters to summon their families to settle on the island, and the island was thriving.

Qin Lang's order to the martial arts lecture hall was very simple, which was to specify an attack direction, the area around the Nasugbo River more than 100 miles southwest of San Francisco City. As for how to fight, it was entirely up to them to do it. Qin Lang just asked them to take Qin Jun with him.

The Taiping and Wu'an brought by Qin Jun also joined the battle.

After a simple discussion, Cunen planned to send 5,000 troops.

As for why there are five thousand people, it is because he thinks this is exactly the number of a brigade.

The brigade he mentioned was actually the organization of an army of the Tang Dynasty field army, which was equivalent to a small army. During the Sui Dynasty, an army had 16,000 people, based on teams and regiments, with a team of 100 people, and a team of 20 infantry and 10 cavalry teams.

One army was four infantry regiments, eight thousand men, plus four cavalry regiments, and four thousand men, plus four thousand men's engineering, baggage regiments, a total of 16,000 people.

When Yang Guang conquered Liaodong, he adopted this large army system. Each regiment was pure team. For example, the infantry of eight thousand people had heavy infantry, equipped with iron armor and spears, while the other four thousand were light infantry, and the crossbowmen were also equipped with swords and shields.

Above pure corps, a mixed corps was formed, with 16,000 troops in one corps. When the Sui Dynasty first conquered Liao, dozens of corps were formed. For example, Yuwen Shu later attacked Pyongyang, which was a super corps composed of nine corpses.

The organization of such a large army in the Sui Dynasty was based on its strong national strength. With excellent equipment and sufficient supply support, fighting was just a word. It was covered with thousands of spearmen in front, followed by countless crossbowmen, and there were also a large number of cavalry. The Sui Dynasty would not play with you any flower team, and there would be too many crossbows like the Song Dynasty. A general once wrote a letter saying that in the army, eight swordsmen, sixteen gunmen, and the remaining seventy people were tied with crossbows.

Song Jun likes to play with the flower team, and he is mixed up at the level of the team.

The Sui Dynasty liked to play pure soldiers, not only were the first level of the team, but the first level of the company was pure soldiers.

Of course, when the Tang Dynasty, especially after entering Zhenguan, under the leadership of the powerful generals such as Li Jing, Li Ji, Qin Qiong and Qin Lang, the Tang Dynasty was invincible, and its military thought began to change, and there were also adjustments in the structure and organization of the army.

The Sui Dynasty liked to play large legion battles, and when it arrived in Zhenguan, it began to focus on mixed and coordinated combat. It turned out that the Sui Dynasty's army had 16,000 troops, or even as many as 20,000 troops.

By the Tang Dynasty, the army had been reduced, with only a few thousand troops in one army, but there was a large army of about 20,000.

A large army is under the jurisdiction of the seven armies, the central army, the left and right Yuhou army, and the left and right wing army.

The Tang army used a team of fifty people as the basic tactical unit, with 4,000 central troops, 2,88 combat soldiers, 400 crossbowmen, 400 archers, 1,000 cavalry, 500 jumping, and 500 surprise soldiers.

A large army had a total of 14,000 horse and infantry soldiers, a total of 280 teams of combat soldiers, and another 6,000 guarded the baggage.

In the past, the Sui Dynasty army had regiments, so it was called a legion. The regiments were all purely corpses. For example, the four cavalry regiments were divided into two thousand heavy cavalry and two thousand light cavalry, four thousand infantry regiments, four thousand heavy s and four thousand light s. The baggage soldiers were 4,000. There were not only baggage soldiers, but also engineers and catapult artillery.

They are all pure infantry combined into an army.
Chapter completed!