Transmigrated as the Crown Prince

Mines are placed in the water and often attack unprepared ships, causing huge damage to passing ships.

The earliest written record of "water mines" can be found in the book "Wu Bian" compiled by Tang Shunzhi, the anti-Japanese hero in the Jiajing period of the Ming Dynasty. The firearms chapter records in detail the method of making this kind of water mine: "Use big wood to make a box, putty to glue the seams. There is a fire inside, use a rope to trip it up, and use three iron anchors to drop it down." This is the earliest written record of the structure of mines in the world.

In 1590, the eighteenth year of Wanli reign of Emperor Shenzong of the Ming Dynasty, the earliest floating mine was invented - the "Underwater Dragon King Cannon" with burning incense as a time fuse. Nine years later, the famous general Wang Heming invented the "underwater thunder" using a rope as a fuse, which was detailed in the "Fire Attack Questions and Answers". Later, after many improvements, the Contact Line Drifting Thunder was born. Scientist Song Yingxing in the late Ming Dynasty named it "Hunjiang Dragon" in "Tiangong Kaiwu".

It was not until the 18th century that Europe and the United States began to use mines in actual combat. During the North American War of Independence, in order to attack the British warships anchored at the mouth of the Delaware River in Philadelphia, the North American people put gunpowder and mechanical fuses in small beer barrels to make mines and floated them down the river on January 7, 1778. Although it did not encounter a warship at the time, it suddenly exploded when it was picked up by British sailors, killing and injuring some people. It was known as the "Keg War" in history.

Modern mines were first widely used during the Russo-Japanese War (1904-1905). The trigger mines used were round spheres with several tentacles. No matter which tentacles the ship touched, it would explode. This type of mine floats in shallow water and is held in place by an anchor chain. When the tide is right, they are just below the surface of the water and explode when a ship touches them. During the Russo-Japanese War, about 2,000 such mines were used, destroying 16 ships. It took an average of 125 mines to blow up one ship.

During World War I (1914 to 1918), modern mine tactics and mine clearance technology were developed. Thousands of mines were laid in the North Sea waters to form a defensive barrier against enemy movements. Mines can also serve an offensive role by quietly laying mines in known enemy shipping lanes. As a result of the laying of 230,000 mines, more than 1,000 merchant ships and warships were damaged. On average, more than 200 mines were used to blow up a ship.

During World War II, the participating countries made great efforts to develop better mine clearance technology to deal with more mines. During World War II, various countries used a total of 100,000 offensive mines and destroyed 2,665 ships. That is, an average of 37 mines were used to blow up a ship. In addition, approximately 80,000 mines were used for defense, blocking the enemy's advance and consuming their resources.

After the war, various countries fully realized the high "cost-effectiveness" of mines and stepped up the research and development of new mines. Representative examples include the Swiss "Storm" mine, the British multi-sensor "Stonefish" mine, and the Soviet Union's directional attack Mines and self-propelled mines developed by the United States.

However, mines are easy to deploy and difficult to sweep, and have long underwater life cycles. During this period, new and old members competed on the same stage. Especially for some countries with underdeveloped naval and air equipment systems, old mines were still used after World War II. The local war brought them unexpected results. During the Vietnam War, the USS Card light aircraft carrier was sunk by a mine. During the Iran-Iraq war, an old-fashioned mine worth only US$1,500 blew a large hole in the new US missile frigate USS Roberts, causing nearly US$100 million in losses.

Because of this, mines, like chemical weapons, are known as the "atomic eggs of poor countries."

Yannick planned to emulate the "Battle of Hunger" that the United States waged against Japan during World War II.

Japan is an island country with developed industry but poor resources. During World War II, 92% of Japan's oil, 100% of rubber and cotton, 87% of iron ore, 90% of coke, 20% of grain and other strategic materials needed to be imported from abroad, and most of the domestic material transportation was through inland sea shipping.

It can be said that the maritime communication line is the "lifeline" of the Japanese country. In view of this, the United States believed that as long as it destroyed Japan's sea lines of communication, it could weaken its economic production capacity and destroy its war machine.

The "Battle of Hunger" lasted four and a half months from March 27 to August 15, 1945. During this period, the US military dispatched 1,528 B-29 bombers and laid 12,053 mines, including 4,900 magnetic mines, 3,500 acoustic mines, There were 2,900 pressure mines and 700 low-frequency acoustic mines (not counting the aircraft deployed by the U.S. Navy and the mines laid). The mines sunk and damaged more than 670 ships, including 65 warships including the USS Seahawk. , of which 431 were sunk or severely damaged beyond repair, with a total tonnage of more than 1.4 million tons, equivalent to 75% of the total tonnage of Japanese ships at the beginning of the campaign.

The minelaying effect of this offensive by the US military was very significant. On average, one Japanese ship was sunk for every 21 mines laid. However, the losses of the US military were extremely slight, with only 15 aircraft lost.

The successful implementation of the "Hunger Campaign" almost completely cut off Japan's vital maritime transportation. In August 1945, compared with March 1945, the transportation volume in the Shimonoseki Strait dropped by 98%, almost completely interrupted, and the Seto Inland Sea could only Small boats such as sailboats. In these four and a half months, imported materials dropped by 90%, and the supply of strategic materials such as petroleum, coal, and food that were urgently needed to maintain the war was almost interrupted; military industrial enterprises suspended production or closed due to the shortage of raw materials; a large number of aircraft and ships were forced to operate due to extreme lack of fuel. The forced grounding and suspension of sailings directly affected the combat effectiveness of the troops; due to the interruption of shipping, 2.5 million tons of rice were piled up in North Korean ports. However, the domestic food supply of Japan was extremely difficult, because the needs of the army had to be prioritized, and the food rations for the civilian population were reduced to a minimum. He has no food to eat and is struggling with hunger all day long.

In this strategic offensive to lay mines, the U.S. military was fully prepared, well planned, coordinated with sea and air forces, concentrated its troops, the vastness of the mined sea area, and the intensity of the mines were unprecedented, especially the last two stages. Within two and a half months, a total of 878 aircraft sorties were dispatched and 7,288 mines were laid. The results were remarkable, and the campaign's attempt to completely block Japan's maritime traffic was finally realized. It dealt an extremely heavy blow to the Japanese country both materially and spiritually, showing the great role of the ancient weapon of mines in modern warfare. Combined with strategic bombing, it greatly accelerated the complete defeat of the Japanese country.

The UK is also an island country and relies on overseas imports for more than 80% of its food and strategic supplies. An average of 2,500 ships sail on the sea every day. Moreover, the total length of the British coastline is about 11,450 kilometers, which is less than half of the Japanese coastline (the total length of the coastline is 29,751 kilometers). In addition, under the current situation, the more than 600 kilometers of coastline on the English Channel side is considered useless, and the United Kingdom has no use at all.

Moreover, mine clearance is a time-consuming and expensive technical job. It was not until the 1970s that Japan in the original time and space cleared 90% of the total mines deployed by the US military along the coast during World War II.

Therefore, Yannick was quite confident in this method and collected many mines from various European countries. Except for inland countries, the rest of the coastal countries will be equipped with more or less mines. Adding Germany's own inventory, the number of ordinary mines alone exceeds 10,000.