What caused tension between the us and soviet union?

Tension between the US and the Soviet Union was primarily fueled by ideological differences, with the US promoting capitalism and democracy while the USSR advocated for communism. Key events, such as the Berlin Blockade, the Korean War, and the Cuban Missile Crisis, escalated hostilities and mistrust. Additionally, the arms race and the competition for global influence during the Cold War exacerbated these tensions, leading to a prolonged period of geopolitical rivalry.