The main elements related to the impact that the Cold War had on Korea and Vietnam are as follows. Firstly, Korea was permanently divided into North and South. This division has affected the whole Korean peninsula as well as the rest of the world up to the present day. Secondly, the fall of South Vietnam caused for the entirety of the Vietnamese area to fall to communism. Today, Vietnam is one of the few countries in the world that has continued to govern with the communist ideology. Lastly, the Cold War caused for there to be wars in both Vietnam and Korea. Both of these wars caused division and destruction in both countries.
An impact that the Cold War had on Korea was that it permanently divided the peninsula into North Korea and South Korea. When the Japanese empire surrendered at the end of World War 2, Korea as a whole peninsula was left open to the emerging superpowers of the world (the Soviet Union and the United States). The tensions and goals of the Cold War by both superpowers caused for Korea to then be separated by them instead of unified. Because of each power’s need to increase its own sphere of influence, the Soviet Union took the Northern part and the United States took the Southern part, with it being divided at the 38th parallel. This division of the Korean peninsula has affected the world ever since the initial division, including the Korean War and the danger that North Korea (still a communist nation) gives to the present-day world.
On Vietnam, the Cold War had an impact that included not only the destruction of its land and the killing of its people, but also its overall fall to communism. A major part of the Cold War was the Vietnam War, which was fought in order to prevent the spread of communism. However, although the United States and South Vietnam spent a lot of money and resources fighting in Vietnam to resist communism, the United States was eventually forced to leave Vietnam due to public disinterest in the United States and the difficulty of finding a way to win. Soon after the United States withdrew from Vietnam, North Vietnam attacked again, this time without the resistance of the US troops. The communists won and took control of the entirety of Vietnam, making the nation communist. To this day, Vietnam remains one of the few communist nations in the world.
A similar impact that the Cold War had on Korea and Vietnam was that both were made to be major battlefields of the Cold War. During the Cold War, there were only a select few areas of large battles taking place between the powers of communism and democracy, and Vietnam and Korea are arguably the two most important. Both wars led to destruction and division in both countries. The Korean War kept the division of North and South Korea by the 38th parallel, but was also a destructive war that was fought throughout the entire peninsula. It is also worth noting that the Korean War was the first and only time throughout the Cold War that US and Soviet troops were fighting directly against each other. The Vietnam War was much more destructive. Constant bombings and the usage of Agent Orange destroyed forests, homes, and lives; thousands of Vietnamese people died, as well as soldiers. The Vietnam war was arguably not only the most deadly war of the Cold War era, but also an eventual cause of its fall to communism and the resulting domino effect that it had on its surrounding countries.