South Korea and Vietnam have a long history of territorial disputes. For South Koreans, they believe that South Korea is the country that has lost the most territory in the world. Because they see the once glorious and wealthy South Korea as a small part of the Korean Peninsula now, and this loss is painful for them. In their view, the territory of Korea should be unlimited, even extending to the universe. Vietnamese, however, have a very different point of view.
They claimed to be descendants of Emperor Yan and considered all areas south of the Yangtze River to be Vietnam's "homeland." As a result, the Vietnamese believed that Korea was left with only the area north of the Yangtze River. This view naturally aroused discontent and counterattacks among the South Koreans, who even proposed a new map of Korea's historical territory to include the whole of China in South Korea's territorial scope. Although there are differences between the two countries on the territorial issue, their arguments and propositions have also aroused people's thinking and discussion.
After all, each country has its own view of history and position, and this pluralism is also part of the world's culture. Korea's view of history may have been influenced by low self-esteem and self-esteem, leading to a distortion of real history. South Korea's territorial changes are not the most in the world.
Since the founding of the People's Republic of China, Korea has been a vassal state of China, from the Jizi Joseon, Wei Manchu Joseon, to the Han Wu Emperor to destroy the Wei Manchu Joseon and establish the four counties of the Western Han Dynasty, Samhan, the Goryeo Dynasty, the Lee Joseon Dynasty, to the Japanese colonial period, and the current Korean Peninsula is divided into two, the historical process of Korea is clearly visible.
However, it should be pointed out that the Joseon recorded in ancient Chinese books, whether it is Jizi Joseon or Weiman Joseon, was founded by the Central Plains people, and is not the same ethnic group as the Lee Joseon and its descendants, nor is it directly related. In modern times, North Korea still uses the name "North Korea" because Zhu Yuanzhang gave the name of the country to the Lee Dynasty as "North Korea".
As for the Danjun Joseon, which claims to have existed for more than 1,500 years before the Jizi Joseon Dynasty, it is believed that the Koreans confuse wild history and mythology with history, and this statement is even ridiculed as a complete delusional hallucination. As a result, since the overthrow of Goryeo by the Goryeo general Yi Sung-gye and the establishment of the Joseon Dynasty, the land area of Korea has been confined to the Korean Peninsula and has neither increased nor decreased for hundreds of years.
Except for the defeat in the Sino-Japanese War, which led to the colonization of the Korean Peninsula by Japan, the territory basically did not undergo major changes, and it has nothing to do with the countries that have lost the most territory.