The manpower and material resources required to build the Great Wall were obviously enormous, but Hadrian's Wall was an exception. The construction of Hadrian's Wall was not built by the Roman Empire, but by three Roman legions of more than 15,000 people over a period of six years.

Moreover, stone, the most expensive building material, was not spent on the construction of Hadrian's Wall. Because the local stone resources are extremely abundant, as long as the local soldiers have the tools, they can mine enough stone for the construction of Hadrian's Wall.

However, the construction of the Great Wall near the fortress of Calais is different, because the fortress of Calais is located on the coastal plain by the sea, and there is no source of stone in the area. If you want to build the Great Wall, you have to bring in bricks or stones from other places.

At the beginning, Marin only built a high-level reservoir using water power near the city of Lyle, which cost more than 200,000 gold coins in just 0.1 square kilometers. Of course, that reservoir used a lot of steel bar, so it was expensive. But the Great Wall that surrounds the fortress of Calais is dozens of kilometers long, to say the least. And, at least, it's taller than Hadrian's Wall, which resembles a fence wall. Therefore, its cost is definitely not small, at least hundreds of thousands of gold coins.

However, John. Raffi deliberately ignored this point when he presented his proposal, instead citing the fact that Hadrian's Wall did not cost much to build. Then, the French monarchs and courtiers, who did not know much about this expertise, were fooled, thinking that they would spend a little more than Hadrian's Wall like Hadrian's Wall. However, they did not expect that the construction of such a Great Wall of dozens of kilometers would be able to empty the French treasury......

These guys, apparently, don't understand construction cost budgeting. However, John. The scene that Lafite described with the Great Wall to block the British invasion of northern France was still imaginable. After all, the effect of the Great Wall is indeed relatively great.

Some people may say that the Great Wall was not 100% protective against the nomads of the north in ancient times. For example, during the Ming Dynasty, the Great Wall in the north was repeatedly breached.

However, you have to take into account that those are special cases. Moreover, even if those northern nomads broke through the Great Wall, they did so through some passes. They were not allowed to climb over the Great Wall, but they had to attack some important passes.

Moreover, the Great Wall is too long, and it is inevitable that there will be omissions, and it must be difficult to guard against. But if it is to defend the small Great Wall of Calais fortress, it is easier to defend. After all, this is a large encirclement, and the situation of the Calais fortress is clearly visible, and it is impossible to be attacked by the other side.

In addition, John. Rafi suggested building a number of beacon-like walls on the Great Wall to protect them from rain. Then, in the pavilions on such ramparts, arquebusiers were deployed. In this way, even if it rains, you can repel enemy attacks with arquebuses......

This practice of building pavilions on the Great Wall did seem to have strengthened the defenses and gave the arquebusiers room to play. However, hidden behind it is a huge increase in costs. If you really want to build the Great Wall according to the high-quality plan, let alone hundreds of thousands of gold coins, you can't beat two million......

But François I and the ministers here did not understand. Raffi braggarts, and they all think it's good. As for the cost, this is not something that the nobles can estimate......

……

The elated François I adopted John on the spot. At Rafite's suggestion, he ordered the construction of the Great Wall surrounding the fortress of Calais, about fifty or sixty kilometers long. Moreover, the French side planned to mobilize 15,000 troops and 20,000 people to build the Great Wall. Naturally, the people built the Great Wall were strong, and the 15,000 troops were to prevent the British troops in Calais from going out of the city to counterattack. After all, building this wall definitely cut off the possibility of the British going out of the Calais fortress to harass France.

Sure enough, when the news reached London, Edward's face darkened. Because, he found that the recapture of the fortress of Calais was not so meaningful.

However, he also has his own way - don't you want to build the Great Wall and surround the fortress of Calais? You always have two ends of the Great Wall close to the sea, right? Okay, just by the sea. When you build on the beach, our warships will bombard, see how you build the seaside part!

After all, the sea is the world of England, and the French can finish most of the Great Wall, but if they want to repair the end of the sea, it depends on whether the English agree or not......

In short, this is a battle to the death between me and you......

When information from London came back to Paris, François I was relieved to learn that Edward was very angry about the construction of the Wall. He was worried that the British didn't care about this little Great Wall. But he didn't know that the British had decided to interfere with the construction of the coastal part of the Great Wall......

To this end, Edward specially ordered 30 Hongyi cannons from Marin, and warships loaded with Hongyi cannons, which were specially used to bombard the construction site of the coastal part.

The effective range of the Hongyi cannon is more than 500 meters, and when it is added to the upper deck of the warship, the firing range is even longer, which can completely hit the French coastal construction site and cannot start work. The small bronze cannon of the French, with a firing range of only more than 200 meters, could not compete with the Hongyi cannon.

Marin also quickly took the order, 30 Hongyi cannons, so he can take out his hand immediately. But the warship carrying the Hongyi cannon, Marin is a little difficult to come up with.

If the 500-ton warship was sold directly to England, the French would know at a glance that it was sold by the North Sea State. In that case, it is inevitable to face the wrath of the French. Marin did not want to provoke the French for the time being, so he thought of the Spanish carac sailing ship......

The Karak galleons were large and sturdy, suitable for heavy artillery. Moreover, the Karak sailing ship had tall towers in the bow and stern, which was suitable for the installation of artillery. The higher the ship, the longer the range of the artillery.

Although the Karak sailing ships are generally small, only two or three hundred tons, a ship can accommodate two or three Hongyi cannons at most, otherwise the hull will not be able to bear it.

But Marin had exactly a dozen Karak galleons in his hands, which were originally used to pretend to be Spaniards, but now they seemed to be of little use. Therefore, Marin decided to refit a dozen two or three hundred ton Carrak galleons in his hand, and covered the hull with some lacquered white iron sheets to withstand the French cannonballs, and handed over these Karak galleons to Edward along with 30 18-pounder Kofilin cannons (Hongyi cannons), and asked them to sabotage the construction of the coastal section of the Great Wall of the French.

……

And at this time, John. Raffi was ordered to investigate the reasons for the loss of the fortress of Calais, and also found out that the British army had used muskets that "could be used on rainy days", and the spearhead was directed at the North Sea State. After all, in these years, the only one who can load a clockwork musket is Beihai Kingdom.

Enraged, François I sent an envoy to the North Sea Kingdom to question Marin. Because, François I felt, those musketeers were probably sent by the North Sea State. Is this still worth it? Slap the face of the Kingdom of France? At this time, if François I hadn't kept his senses, he probably wanted to send troops to attack the North Sea Kingdom...... However, because Spain and England were on the side, François I endured his anger and did not send troops......

Marin also knew this, but he knew that this time should not be too irritating to France. Otherwise, the young and vigorous François I might really disregard the overall situation and send heavy troops to attack him.

Therefore, Marin directly shook the pot and said:

"The North Sea State did not send troops to participate in the battle against Calais, absolutely not! A few days ago, however, King Edward of England did order a batch of flaunts from me......"

With that, he also produced a subscription contract to prove that England had indeed purchased wind-up muskets from him......

This document was signed by Edward on the spot during Marin's visit to London. Its purpose is to confuse the eyes of the French in order to achieve the purpose of throwing off the pot. After all, Marin doesn't want to start a fight with France yet.

Therefore, the last time he negotiated with Edward in London to attack Calais, Marin prepared this subscription contract and asked Edward to use the king's seal and sign it himself......