"Coco (g! U) Li (lí) "(37 BC-668 AD) (also called Kekeli in historical books, now called Kekeli) was a national regime that existed in the northeast of China and the Korean Peninsula from the 1 century BC to the 7th century AD. Its ethnic groups are mainly Yu people (including Wokuotai people and Dongruo people) living in the northeast of China and the Korean Peninsula, and ethnic groups living in ancient Korea. Because of its special geographical location, Koguryo's territory spans today's China, South Korea and North Korea, so it is claimed that Koguryo is the original nation of its own country. [People's Republic of China (PRC) was founded (37 BC-52 AD) According to the Records of the Three Kingdoms and the Heritage of the Three Kingdoms, in 37 BC, Zhu Meng, the prince of Fuyu, fled Fuyu, died in Fuyu and founded Goguryeo. Some scholars believe that Koguryo was established as early as the 2nd century BC. Koguryo, as a geographical term of 1 13 BC, appeared in Hanshu. According to the Book of the Old Tang Dynasty, Emperor Taizong believed that Koguryo had a history of 900 years. However, according to most historical records, Koguryo was built in 37 BC or in the middle of 1 century BC. According to the records of the Monument to the King of Tai Hao in the 4th century BC, Zhu Meng, the founder of Koguryo, was the son of the daughter of Fuyu King and River God. According to the Records of the Three Kingdoms and the Records of the Three Kingdoms, Zhu Meng's mother's name is Liu Hua and his father is Xie Mushu, the founder of Fuyu Kingdom. After Zhu Meng was murdered by Su Dai, he fled Fuyu country (The Monument to the King of Tai said that Zhu Meng fled to Fuyu in the north, while The History of the Three Kingdoms and The Heritage of the Three Kingdoms said that Zhu Meng fled to Fuyu in the east. ), just to pawn this extra. Zhu Meng married the daughter of the king who died in Fuyu, and later became the king of Fuyu and established Koguryo. In 36 BC, Goguryeo went out of the boiling country; In 33 BC, the country perished; In 28 BC, Wazhou in the north was destroyed. Centralization and Early Expansion (A.D. 53 -243) During the reign of Taizu of Koguryo in the Three Kingdoms Period, Koguryo rapidly expanded from several early tribal countries to the Hanjiang River Basin. In 53 AD, Emperor Taizu of Goguryeo set five tribes scattered in Goguryeo as five provinces and centralized them. In 56 years, Taizu annexed Dongyuju. Later, it annexed part of Dongling. Subsequently, Koguryo launched an attack on Lelang County, Xuantu County and Liaodong. Completely get rid of the control of the Han dynasty. The expansion and centralization of Koguryo led to a direct armed conflict with the Han Dynasty. The military pressure of the Han Dynasty forced Koguryo to move to Marukou, the capital. The Battle between Koguryo and Cao Wei (A.D. 244-A.D. 299) After the demise of the Han Dynasty, Liaodong County was controlled by militant local tyrants. Koguryo took the initiative to attack Liaodong County with the newly established Cao Wei Alliance. After Cao Wei captured Liaodong, Goguryeo stopped cooperating with Cao Wei and sent troops to attack the western part of Liaodong. In 244, Cao Wei counterattacked and destroyed Malukou City. King Koguryo Dongchuan fled to Wozhou. Revival and further expansion (AD 300-AD 390) After Cao Wei destroyed Maru State, he thought Koguryo was extinct, so he quickly withdrew his troops. However, in just 70 years, Koguryo rebuilt Marukou and began to attack Liaodong, Le Lang and Xuantu. With the advance of Koguryo in Liaodong Peninsula, in 3 13, King Jiangchuan of Koguryo annexed Lelang County, the last county of the original four Han counties. Koguryo controls the whole northern part of the Korean peninsula. From then on, the Korean peninsula entered the Three Kingdoms period (Koguryo, Baekje and Silla). In 342, Maruko was attacked by Qian Yan. In 37 1 year, Baekje near Xiaoguwang attacked Pyongyang, the largest city in Koguryo, and killed the former Koguryo king on the battlefield. After Lin Wang, a small animal of Koguryo, succeeded to the throne, he began to strengthen the stability and unity of Koguryo. A new law has come out. In 372, Buddhism was established as the national religion of Koguryo, and the national educational institution Taixue was established. Little Beastmaster Lin also reformed Koguryo's army. In its heyday (391–531), at the end of the 5th century A.D., the territory of Korea in the Three Kingdoms period entered its heyday from the succession of King Koguryo. According to the records of the monument built by his son Changshou Wang, Wang captured Fuyu 64 city 1400 village in World War I. Later, King Tai Hao killed Houyan; Annexed Fuyu country and Mohong tribe in the north; Make Baekje a vassal of Koguryo; The disintegration of gender and development; Silla became the protectorate of Koguryo in the wars between Silla and Baekje, and between Kadai and Japan. In this way, during the reign of King Tai Hao, the Korean Peninsula was loosely unified for 50 years. During the reign of King Tai Hao, the Koguryo area on the Korean peninsula has reached 3/4 of the peninsula area. The northern part includes most of today's northeastern China, and the eastern part extends to the southern part of the Russian Primorsky Krai. In 4 13, Koguryo Longevity King ascended the throne. Due to the confrontation between Baekje and Silla, in 427, Changshou Wang moved to Pyongyang to strengthen his control over Baekje and Silla. The longevity king continued the expansion policy of his father, King Tai Hao. At the end of the 5th century, the longevity king annexed some Fuyu, Mohong and Qidan tribes. Confrontation with the Northern Wei Dynasty; And keep control of Silla. Internal strife (53 1 -55 1) Koguryo reached its peak in the 6th century and began to decline gradually. After the assassination of Koguryo Anzang, his brother Wang Anyuan succeeded to the throne. During the reign of King Anyuan, the royal family disputes intensified. The two political groups fought for the right to inherit the throne. Finally, the eight-year-old Yangyuan Wang ascended the throne. But the power struggle is not over. The aides of the opposition began to form their own army and actually control their own territory. In 1950s, North Koguryo was attacked by nomadic people. However, the internal struggle of Koguryo continues. 55 1 year, Baekje and Silla jointly attacked Koguryo. At the end of the 6th century and the beginning of the 7th century, Koguryo began to fight frequently with Sui and Tang Dynasties. During this period, Koguryo's relationship with Baekje and Silla was very complicated, with friends and enemies. 55 1 year, Baekje and Silla jointly attacked Koguryo. Koguryo lost the rich and strategic Hanjiang River Basin in the central part of the Korean Peninsula. Baekje, the main soldier of Baekje Silla League, was almost exhausted in the war against Koguryo. In 553, Silla sent troops in the name of helping Baekje. However, the attack on Baekje was launched, and finally the whole Hanjiang River basin was included. Angry at Silla's betrayal, King Baekje attacked the west of Silla in the second year to avenge himself, but was captured by Silla and later killed. The war in the central part of the Korean peninsula has had a far-reaching impact on the pattern of the Korean peninsula. Silla's attack on Baekje made Baekje the weakest on the Korean peninsula. Silla occupied the Han River basin with a large population and wealth, which laid a good foundation for its future expansion. On the contrary, Koguryo's national strength has been greatly reduced because of the loss of the Hanjiang River Basin. In addition, Silla's territory reached the Yellow Sea after it acquired the Hanjiang River Basin, enabling it to directly trade with China and establish diplomacy. So Silla will no longer rely on Koguryo, but learn advanced culture and technology directly from China. The direct exchange and alliance between Silla and China finally brought disastrous consequences to Koguryo in the 7th century. The expansion of Koguryo in the 6th century made the relationship between Koguryo and Sui tense. In 598, Koguryo attacked western Liaoning, which triggered the first war between Koguryo and Sui. However, Sui was defeated by Koguryo's army. In the following three wars, 6 12, 6 13 and 6 14, Sui did not win Goguryeo. In 6 12, Sui suffered the most serious war losses against Koguryo. Sui million troops attacked Koguryo from land and sea, but were devastated by Koguryo, and almost all the troops were wiped out. In 6 13 and 6 14, Sui attacked Koguryo again, but due to the rebellion of Yang Xuangan, Koguryo surrendered to the defected Sui general, and these two anti-Koguryo campaigns were cancelled. In 6 15, Emperor Yang Di planned to attack Koguryo again. However, due to the intensification of civil strife in the Sui Dynasty, the plan to attack Koguryo was cancelled. The war against Koguryo in the Sui Dynasty sharply reduced the national strength of the Sui Dynasty, coupled with domestic uprisings and civil strife. In 6 18, the sui dynasty fell. But the war between Sui and Koguryo also weakened Koguryo's national strength. Tang's attack on Koguryo was very unsuccessful at first, and he lost the strategic points in countless battles. After defeating Koguryo's ally Turkic, Tang formed an alliance with Silla. In 642, General Yuan Gai of Goguryeo assassinated the Queen, and the relationship between Tang and Goguryeo was tense. Because Yuan Gai is very challenging to Tang. In 645, Emperor Taizong attacked Goguryeo again, but Goguryeo, led by Yuan Gai and Yang Wanchun, defeated Tang's invasion. Don suffered a serious loss. After the death of Emperor Taizong in 649, the Tang Dynasty sent troops to attack Koguryo in 66 1 and 662 respectively. Although Tang's attack brought losses to Goguryeo, Tang never defeated Goguryeo. In 660, Koguryo's ally Baekje in the southwest was destroyed by Tang and Silla. The allied forces of Tang and Silla continued to attack Koguryo for the next eight years. In 666 AD, after Yuan Gai's death, Yuan Gai's eldest son Tong went to the front to inspect the military situation and prepare for war. Let Yuan Nanjian and Yuan Nanchan stay in Pyongyang. Yuan Nanjian and Yuan Nanchan took advantage of his eldest brother's absence, framed him for defecting to the Tang Dynasty, and forced King Koguryo to arrest Yuan Tongzi. The deep boy had no choice but to take refuge in the Tang Dynasty and was reused by the Tang Dynasty. Deep boys led Tang Jun to attack Koguryo, hoping to regain power. In 668, Yuan Boy led Tang Jun to destroy Koguryo.