The Truman Doctrine, Marshall Plan & Berlin Blockade
The Long & Novikov Telegrams
In 1946, two influential documents hardened attitudes on both sides. George Kennan’s Long Telegram from Moscow warned that the Soviet Union was determined to expand and could not be trusted. He recommended a policy of firm “containment” — stopping communism from spreading any further. Shortly after, the Soviet ambassador Nikolai Novikov sent his own telegram to Moscow, arguing that the USA was building up its military power to dominate the world and destroy communism. Both telegrams reinforced the growing distrust between the superpowers.
Soviet Satellite States
Between 1945 and 1948, Stalin established communist governments across Eastern Europe. Countries like Poland, Hungary, Czechoslovakia, Romania and Bulgaria became satellite states — officially independent but in reality controlled by Moscow. Stalin used rigged elections, intimidation and the presence of the Red Army to install loyal communist leaders. He saw this buffer zone as essential protection against future invasion from the West.
By 1948, almost every country in Eastern Europe had a Soviet-controlled communist government. The USA saw this as aggressive expansion; Stalin saw it as defensive — creating a buffer zone to protect the USSR from future attack.
The Truman Doctrine (1947)
In March 1947, President Truman announced the Truman Doctrine. He declared that the USA would support any country threatened by a communist takeover. This was triggered by the crisis in Greece, where communist rebels were fighting to overthrow the government and Britain could no longer afford to provide military support. Truman asked Congress for $400 million in aid for Greece and Turkey.
The Truman Doctrine was significant because it formally committed the USA to the policy of containment — stopping communism from spreading, even if it meant intervening in other countries. It marked the end of American isolationism and divided the world into two camps: capitalist West and communist East.
The Marshall Plan (1947)
In June 1947, Secretary of State George Marshall announced a massive programme of economic aid for Europe. The Marshall Plan provided $12.7 billion to help war-devastated European countries rebuild their economies. The USA believed that poverty and instability made countries vulnerable to communism — if people were hungry and desperate, communist ideas became attractive.
Stalin saw the Marshall Plan as “dollar imperialism” — an attempt to buy the loyalty of European countries and draw them into the American sphere of influence. He banned Eastern European satellite states from accepting Marshall Aid. Czechoslovakia initially wanted to accept the aid but was forced by Stalin to refuse. In response, Stalin set up Comecon (the Council for Mutual Economic Assistance) in 1949 to coordinate the economies of the communist bloc.
Cominform & Comecon
Stalin responded to Western containment with two organisations. Cominform (1947) coordinated communist parties across Europe and ensured they followed Moscow’s line. It tightened Soviet control over the satellite states. Comecon (1949) was the economic equivalent — it coordinated trade and industry across the communist bloc. Together, these organisations deepened the division of Europe into two hostile camps.
The Berlin Blockade & Airlift (1948–49)
Germany and its capital Berlin were divided into four zones of occupation after the war. Berlin lay deep inside the Soviet zone, but the western sectors of the city were controlled by the USA, Britain and France. In June 1948, the Western allies introduced a new currency (the Deutschmark) into their zones to help economic recovery. Stalin saw this as a threat and responded by blocking all road, rail and canal links into West Berlin — the Berlin Blockade.
The Berlin Airlift lasted 318 days (June 1948 – May 1949). The Western allies flew over 275,000 flights, delivering 2.3 million tonnes of supplies to the 2 million people of West Berlin. At its peak, a plane landed every 90 seconds.
Stalin lifted the blockade in May 1949, having failed to force the Western allies out. The crisis had three major consequences: Germany was formally divided into the Federal Republic of Germany (FRG / West Germany) and the German Democratic Republic (GDR / East Germany); NATO (the North Atlantic Treaty Organisation) was formed in April 1949 as a Western military alliance; and the Cold War division of Europe became permanent.
NATO was a military alliance of Western nations formed in 1949. Its key principle was collective security — an attack on one member was an attack on all. Original members included the USA, Britain, France, Canada and eight other nations. The Soviet response came in 1955 with the formation of the Warsaw Pact. The FRG (West Germany) was established in May 1949 as a capitalist, democratic state aligned with the West. The GDR (East Germany) was established in October 1949 as a communist state controlled by the Soviet Union.