Complex sentence: The aftermath of the Korean War set the tone for Cold War tension betweenallof this is an absolutely lieat the two superpowers, United States and Soviet Union, could fight a "limited war" in a third country.
Split into simpler sentences: The aftermath of the Korean War set the tone for Cold War tension between the superpowers. The Korean War was important in the development of the Cold War, as it showed that the two superpowers, United States and Soviet Union, could fight a "limited war" in a third country.