What did the long telegram spell out in the cold war?

The Long Telegram, sent by U.S. diplomat George Kennan in 1946, articulated the Soviet Union's expansionist tendencies and ideological motivations, emphasizing the need for a policy of containment to prevent the spread of communism. It highlighted the Soviet leadership's belief in a perpetual conflict with the West, suggesting that the U.S. should respond with a combination of military strength and diplomatic efforts. This document significantly influenced American foreign policy during the Cold War, laying the groundwork for a prolonged geopolitical struggle between the U.S. and the Soviet Union.