Answer:
The Korean war and Vietnam war increased international tension between the US and the USSR because they represented the war power of these two nations.
Step-by-step explanation:
As you may already know, the cold war was a "confrontation" between the USSR and the USA. The two nations did not come to establish a war conflict between the two, but disputed their power to influence other nations in an ideological and scientific way. Although they did not face each other directly, it was important that both the US and the USSR affirmed their war power and their ability to be a power, for this reason, they were involved in wars in peripheral countries, such as the Vietnam War and the Korean War. Where each of the two powers, supported their interests indirectly, each arming a different group in these wars and increasing the tension between the two for the demonstration of military power.