Since the beginning of the history of the Korean people, there have been numerous foreign invasions, but each time, our ancestors have overcome national difficulties with the will of the hot country and extraordinary fighting spirit. There are countless heroes of the country who have displayed outstanding leadership in every national crisis, but no one can dispute the fact that Yi Sun-shin is the greatest hero, hero, loyalist, and martyr. Yi Sun-shin was the best war hero in Korean history, and when the country and its rivals were on the verge of collapse due to unprecedented disasters such as the Imjin War and Jeongyu Jae-ran, he commanded the Joseon Navy and won consecutive battles with his beliefs and extraordinary strategies. He was born as the son of a poor scholar and was a great teacher of the people who consistently maintained loyalty, humanity, and patriotism despite all kinds of hardships during his short life of 54 years. "It is hard for the British to admit that Admiral Yi Sun-shin of Joseon is an excellent commander comparable to that of Horatio Nelson, but it is undeniable that Yi Sun-shin is the best admiral in the East," said Maj. G.A. Billard, who was the principal of the Royal Naval Academy. Dr. Ray Huang, a Chinese-American historian and professor at Washington State University in the U.S., praised Yi Sun-shin as one of the three greatest war heroes in Oriental history, Chen Hundao of the Vietnamese Dai Biei Dynasty, and Wen Sung-hwan of the Ming Dynasty. In light of the situation in and out of the country today, especially the political and economic crisis that is once again missing, Lee Sun-shin is reminded of the fact that he was a CEO with extraordinary leadership in addition to the known master of saving the country. In order to survive infinite competition with powerful countries in the face of a new turbulent era of the 21st century, we will have to find the wisdom of overcoming the national crisis through the leadership of Seongwoong Lee Soon-shin, who was greater than any great man in East and West. ◆ Like the Japanese military, which went north like an uninhabited border, when the naval forces were self-destructed at the beginning of the war, and Busan and Dongnae-seong collapsed one after another, the Japanese army landed with a ring in its mouth. Following the first army of Yukinaga Konishi, the second army of Kiyomasa Kato on April 18 and the third army of Nagamasa Kuroda on April 19 were constantly flooded to Busan and Gimhae, the bridgehead. A large army of 52,500 men completed the landing operation in just six days. In the 16th century, when there were no landing equipment, it was impossible to land 10,000 people a day with essential military supplies such as weapons and food without meticulous operational planning and training, and this was the result of Toyotomi Hideyoshi mobilizing 200,000 troops in Kyushu. On April 19, the vanguard of the 4th and 7th armies landed in Busan, and the follow-up troops continued to land. The Korean Strait between Busan and Tsushima became like a dedicated route for the Japanese invasion forces, and there was constant traffic of transport ships carrying Japanese troops and equipment. On 17 April, Konishi Yukinaga's First Army captured Yangsan and invaded Ulsan one after another. Lee Gak, a Gyeongsangjwa soldier who had a military camp in Ulsan, first sent 1,000 concubines and beets and fled. So those who died unjustly were innocent people. The Japanese troops continued to move northward, sweeping Eonyang, Gimhae, Gwangju, and Changwon. Meanwhile, Kim Sung-il, who served as Gyeongsangwoo soldier instead of old and sick Cho Dae-gon, heard the news that a war broke out on his way to his post. He was a person who falsely reported that there would be no war after visiting Japan as an envoy. Nevertheless, he posted a ridiculous false report, saying, "There are only 400 enemy ships, and there are only 10,000 troops on board each ship." It was the largest invasion by foreign enemies since the founding of the Joseon Dynasty, and the quality of a person appointed as a border general was this pathetic. The Japanese troops, who succeeded in the landing operation, divided into three routes and started northward. Konishi Yukinaga's 1st army took the middle road to Chungju via Yangsan, Miryang, Cheongdo, Daegu, Andong, Seonsan, Sangju, and Mungyeong, and Kiyomasa Kato's 2nd army took the left road to join the 1st army in Chungju via Ulsan, Gyeongju, Yeongcheon, and Gunwi. In the meantime, it's YOSHI KUKIThe Japanese navy, led by Kha and Takadora Todo, guarded the sea and operated to neutralize the power of the Joseon navy. It was on April 17, three days later, that the Joseon Dynasty received a report of invasion by the Japanese army, through Janggye sent by Park Hong, the Gyeongsangjwajusa. Subsequently, Kim Sung-il, who changed his position from Gyeongsangwoo soldier to Choyusa, and Kim Soo-soo, a patrolman in Gyeongsang-do, rose. Only then did the mediation realize that the situation was serious and began to take measures. Shortly after the opening of the war, Kim Su received a report from Gyeongsangwoo Byeongyeong in Jinju. He immediately ran to Dongnae, but after the castle had already fallen, he returned to Jinju and sent a general to the court, and on the 18th, he ordered Won Gyun, the Gyeongsang Usu Temple, to mobilize battleships and troops to attack the enemy. However, Won Gyun was surprised to see the power of the enemy's forces, so he did not even think about fighting, and threw all his artillery and bullets into the sea and dispersed 10,000 soldiers. Then he fled with only six military ships. In the early days of the war, the so-called Wonkyun Yongjang theory, which claims that Won Gyun, who was in a hurry to escape from the nearby Gyeongsangjwasuyeong by burying a huge amount of power in Gyeongsang Udo, fought with a small Japanese fleet near Gadeokdo Island, is just a historical distortion. Kim Soo also sent a notice to other villages to evacuate the people to the leaders and to gather the soldiers at the scheduled gathering place according to the Jeseung strategy. He also informed nearby military commanders of the Japanese invasion. This notice was delivered to Yi Sun-sin of Jwasuyeong, Jeolla Province on April 19. ◆ The Joseon royal court, which was confused, tried to punish Kim Sung-il by taking issue with a false report that there would be no Japanese invasion. Kim Seong-il was appointed as a Gyeongsangwoo soldier and arrested by Geumbudosa, who came down from Seoul, and Yoo Sung-in, Haman-gun, was appointed as a successor. The situation turned around when Kim Sung-il reached Jiksan, Chungcheong-do, while being arrested and transported to Seoul. Lee San-hae and Yoo Seong-ryong, who were in control of the regime at the time, persuaded Seonjo to pardon him for his crime, and Gyeongsang-woo also ordered him to collect public sentiment and gather troops to fight the enemy. The government held daily meetings and took measures. At that time, Yeonguijeong was Lee San-hae, Left Ui-jeong was Yoo Seong-ryong, Right Ui-jeong was Lee Yang-won, and Byeongjo Panseo was Hong Yeo-soon. Yoo Seong-ryong also served as a book of Yi Jo Pan. King Seonjo accepted Yoo Seong-ryong's suggestion, and instead of Hong Yeo-soon, who did not know the military, he used Kim Eung-nam as the military governor, and Shim Chung-gyeom as the military governor. In addition, after accepting Daegan's suggestion, Yuseongryong was appointed as the provincial inspector and Kim Eung-nam as the deputy inspector, respectively, to lead the war. The most urgent thing was to prevent the Japanese troops from advancing northward as if they were going to the uninhabited landscape. The first defense strategy was to prevent the Japanese army from crossing Mungyeong Saejae Pass and Chupungryeong Pass, which are natural fortresses. If the two key points are crossed, it was obvious that the Japanese military would approach the capital city of Seoul in a single stroke. King Seonjo appointed Lee Il as a martyr and ordered him to go down with the military and defeat the Japanese in Sangju. But what's surprising is that there was no army to lead to the battlefield. For this job, he tried to gather 300 soldiers to compete, but there were no soldiers that could be used even if he gathered for three days. Therefore, he was forced to gather soldiers and follow them, and then he left first. In the royal court, Seong Eung-gil was used as a left guard, and the Japanese troops heading north on the left road leading to Gyeongju, Yeongcheon, Andong, Yeongju, and Jukryeong were hit in Jukryeong, and the landscaping was used as right guard to take the right road leading to Gimhae, Haman, Geumsan, and Chupungryeong. In addition, a toilet was appointed for Mungyeong Saejae Pass, and Yu Geuk-ryang was appointed as the head of the group in Chupungryeong Pass to defend. Subsequently, King Seonjo appointed Shin Lip, who was famous as the best master of Joseon at the time, as Dosun Byeonsa Temple, to protect Chungju, where left and middle roads meet. It was a strategy to prevent the Japanese military from moving north in Chungju if both the Joryeong and Chupungryeong were breached. Of course, it was an excellent strategy if it went the way it was. Shin Rip left with 80 soldiers using Kim Yeo-mul as his official. In the meantime, the first Japanese army captured Miryang on April 19, crossed the Nakdonggang River through Andong on the 23rd, passed through Seonsan on the 24th, and advanced to the outskirts of Sangju on the 25th. The 2nd Army passed Eonyang on the 19th, Gyeongju on the 21st, Yeongcheon on the 22nd, and the 3rd Army swept Yeongsan, Changnyeong, and Hyeonpung following Gimhae on the 20th and Changwon on the 21st, and trampled Seongju on the 27th. However, most of the responsible leaders who had to fight the enemy for their lives and protect the people and Gangto were busy running away, and all they said was to do was to run away on their own. Therefore, the only people who died at the stabbing of the Japanese army were innocent people, and their miserable screams shook heaven and earth. ◆ Lee Il, a martyr to the defeat of the Tangeum Battle, crossed Saejae Pass and arrived in Mungyeong, but the castle was empty. When I entered Sangju on April 23, Pastor Kim Hae-ri said that he had not heard from him after going out to greet Sunbyeonsa Temple, and he was guarding Judge Kwon Gil alone, but he gathered about 800 people, saying that he was a soldier, most of whom had never received military training. The next day, the 1st Army's vanguard, led by Konishi Yukinaga and Soyoshitomo, advanced to Jangcheon, 20 ri south of Sangju, and camped. When one of the people living in Gaeryeong rushed to inform him of this, Yi Il locked him in prison, and the next day, he was cut off for disturbing the public's feelings, and took the people to Bukcheon for training. This incident did not even place sentries around the position, but shortly after a Japanese patrol appeared and examined the movements, the enemy's attack began soon. They were soldiers who had no proper weapons and were not trained soldiers. Lee Il's troops, who are not even regular soldiers, quickly scattered, and the Japanese army shot after the fleeing Joseon people. Lee Il, who managed to save his life and run away, fled to Chungju beyond Joryeong after posting a general plan that he had lost in Mungyeong. In addition, the Japanese army advanced to Mungyeong without a single resistance and occupied the castle. It was April 26th. On the same day, Dosunbyeonsa Temple Sinrip arrived in Chungju. At that time, Pastor Chungju Lee Jong-jang was waiting for him with 8,000 soldiers from all over Chungcheong-do, most of whom were mounted soldiers. Shin Lip scouted a bird near Chungju. Kim Yeo-mul, an official of the company, and other staff members suggested that he defend Sae-jae, but Shin Rip ignored it and did not listen. Saejae was a natural fortress that could block 1,000 enemy soldiers if one bookkeeper blocked it. It was a mercenary tactic that was not like a "master of the time" where such absurd tactics came from to wait for the enemy to come safely without keeping the key points like Saejae. Yukina Konishi, who sent a scurvy to check the bird's nest carefully, said with a big smile at first when he heard the report of the scurvy that Saejae had no ambush in the bird's nest. "What a dull long life. If Shin Rip, the best master of Joseon, is like me, it would be worth knowing the level of other Joseon generals." As expected, on April 28, Shin Rip came out of Chungju with a military service and hit Tangeumdae in Dalcheon, 10 ri north of Chungju, upstream of the Namhangang River. In the old days, it was a plan to recreate the field of repentance that won the horse-riding battle against the Yeojin people in Hamgyeong-do. However, Tangeumdae Terrace was not a dry field where horseback riding soldiers were good to run. Since it was a wetland along the river, it was a place where even infantry could not run at will, let alone horses. In addition, the battle was not a one-on-one fight with a spear and a sword, but a rifle. However, Shin Rip did not choose such a tactic without knowing that. This is the part of the book Jingbirok by Yoo Seong-ryong. It was right after the government sent Shin Rip and Yi Il to check their defense posture in early Imjin. 'It's been rumored to be cruel and mean from the beginning. He tried to kill people everywhere he went and set up his dignity, so all the chiefs were afraid... ...and they returned to Seoul on April 1st. At this time, Shin Lip came to me as a private house, so I looked at him and asked. "Maybe there will be a war in our country soon. Then you will be in charge of the army. Are you confident that you will be able to defend yourself from the enemy's situation today?" he said casually. "There's nothing to worry about." I said it again. "That's not true. Before, Japanese soldiers had only a short weapon, but now they have a muzzle, how can they be easily seen?" But Shin Rip always spoke in a nonchalant tone. "Why do soldiers say they have a rifle, but it fits every time they shoot?" Shin Lip was like this. Around noon on April 28, 15,000 Japanese soldiers, led by Yukinaga Konishi, surrounded the Shinto army on three sides and launched an attack. Most of the 8,000 Joseon government troops were mounted soldiers, and the river flowed behind them, and more than twice as many enemy troops surrounded three sides, so the Joseon government army would have fought a charge. However, the main weapon of the Japanese army was not a spear and a sword, but a muzzle. As Cho continued to fire, horses and people went out without hesitation. In addition, the horseshoe fell into the swamp and couldn't even move properly. In the meantime, Japanese soldiers rushed in like evil spirits and stabbed, cut, and knocked down the Joseon government army. Shin Lip fought hard by taking out the Hwando and cutting down the enemy soldiers, but it was impossible to recover the already tilted situation. He belatedly realized his mistake and jumped into the Namhangang River, covering his face, and drowned. Kim Yeo-mul, a civil servant, Lee Jong-jang, and Jo Bang-jang, a pastor of Chungju, disappeared due to the dew of the battlefield after Shin Rip. In this massive battle, which took place for the first time since the Japanese Invasion of Korea in 1592, more than 8,000 Joseon government troops were devastated. As a result, Joseon was deprived of all of Gyeongsang-do by the Japanese military only 15 days after the Japanese Invasion of Korea in 1592. Hwang Won-gap's Revival Yi Sun-shin Eco Business 2004; Kim Jong-dae's Shin still has 12 warships. BookForce 2001, Choi Doo-seok's Japanese Invasion of Korea and Yi Sun-shin's Lee Sun-shin's 1999 history