Answer:
Korea, atomic weapons
Step-by-step explanation:
truman was afraid the soviets would sieze control of Korea before the United States could get there. Fortunately the Soviets honored previous agreements and did not sieze control, the Korean peninsula was then divided along the 38th parallel (latitude) with the socialist north and capitalist south. The problem of atomic weapons was resolved with the first SOVIET test of an Atomic bomb in 1949 these events sowed the mistrust that would become the cold war.