How did the US view Soviet Union buffer zone?

The U.S. viewed the Soviet Union's buffer zone, established after World War II, with suspicion and concern. This zone, consisting of Eastern European countries under Soviet influence, was seen as a means for the USSR to spread communism and expand its geopolitical power. American policymakers believed it posed a direct threat to democracy and capitalism, leading to a policy of containment aimed at preventing further Soviet expansion. The establishment of this buffer zone intensified the ideological and military tensions of the Cold War.