The development of the Cold War, including the Truman Doctrine (March 1947), the Marshall Plan (June 1947), the response of the USSR through Cominform and Comecon, and the consolidation of the two blocs

What this dot point is asking

NESA expects you to explain how, between March 1947 and the formation of NATO in April 1949, the United States moved from wartime alliance to formal containment, the Soviet Union responded by tightening control over Eastern Europe, and Europe was divided into two economic and ideological blocs.

The answer

The context, 1946 to early 1947

Three events framed the shift. George Kennan's "Long Telegram" from Moscow (22 February 1946, 8,000 words) argued that Soviet behaviour was driven by internal insecurity and Marxist-Leninist ideology and could only be contained by "firm and vigilant" American counter-pressure. Churchill's Fulton speech (5 March 1946) named the "iron curtain" descending from Stettin to Trieste. The Kennan-Churchill diagnosis became orthodoxy in Washington over 1946.

Britain's economic crisis triggered the doctrine. On 21 February 1947 the British government informed Washington that it could no longer fund its commitments to Greece (where the British-supported royalist government was fighting communist EAM-ELAS insurgents) or Turkey (under Soviet pressure on the Straits and the Kars region). The Truman administration had three weeks to respond.

The Truman Doctrine, 12 March 1947

Truman addressed a joint session of Congress. He requested $400 million for Greece and Turkey and articulated the principle that became containment: "It must be the policy of the United States to support free peoples who are resisting attempted subjugation by armed minorities or by outside pressures."

The speech was deliberately universal. Senator Vandenberg had told Truman he would need to "scare the hell out of the American people" to pass the bill through a Republican Congress; Truman did. The doctrine ended American case-by-case engagement and committed the United States to a structural global role.

The bill passed: House 287 to 107, Senate 67 to 23 (15 May 1947). Greek government forces defeated the insurgents by October 1949, aided by Tito's closure of the Yugoslav border in July 1949.

The Marshall Plan, 5 June 1947

Secretary of State George Marshall, in a 12-minute Harvard commencement speech, offered American economic aid to "the whole of Europe" to combat "hunger, poverty, desperation and chaos." The offer included the USSR.

Britain (Bevin) and France (Bidault) convened a Paris conference on 27 June. Molotov attended with a 100-strong Soviet delegation but walked out on 2 July, citing the Plan's requirement for transparent national accounts as a violation of Soviet sovereignty. The USSR pressured Czechoslovakia and Poland to withdraw their initial acceptance.

The Economic Cooperation Act (3 April 1948) created the Marshall Plan. The Organisation for European Economic Cooperation (OEEC, 16 April 1948) coordinated 16 recipient states. Disbursements ran from April 1948 to June 1952, totalling approximately $13 billion (about$150 billion in 2020s dollars). The largest recipients were Britain (about $3.3 billion), France ($2.3 billion), Italy ($1.5 billion), and West Germany ($1.4 billion).

The Plan rebuilt European industrial output to 35 per cent above 1938 levels by 1951, bound European economies to the United States through trade, and accelerated European economic integration (the Schuman Plan 1950, ECSC 1951).

Soviet response: Cominform, Czech coup, Comecon

Cominform (the Communist Information Bureau) was founded at Szklarska Poreba in Poland on 22 to 27 September 1947. Soviet ideologist Andrei Zhdanov delivered the "two camps" speech: the world was divided between the "imperialist and antidemocratic camp" led by the United States and the "anti-imperialist and democratic camp" led by the USSR. Cominform tied the French, Italian, and Eastern European communist parties to Moscow's line.

The Czechoslovak coup (25 February 1948) ended the last coalition government in Eastern Europe. Communist Interior Minister Vaclav Nosek's purge of non-communist police triggered the resignation of 12 non-communist ministers; President Edvard Benes appointed a communist-led government rather than risk Soviet intervention. Foreign Minister Jan Masaryk died on 10 March, falling or being thrown from a Foreign Ministry window. The coup horrified Western opinion and accelerated the Brussels Pact (17 March 1948).

The Cominform expelled Yugoslavia on 28 June 1948 after Tito refused Soviet direction; Yugoslavia became the only successful communist break with Moscow before 1989.

Comecon (the Council for Mutual Economic Assistance) was founded on 25 January 1949 as the Eastern equivalent of the OEEC. Comecon was weaker: it coordinated trade but not production. The Eastern bloc economies remained tied bilaterally to the USSR.

Consolidation of the blocs

By spring 1949 the two blocs were fixed. The Brussels Pact (17 March 1948) bound Britain, France, and the Benelux; it became the basis for NATO (4 April 1949). The Federal Republic of Germany was proclaimed on 23 May 1949; the German Democratic Republic on 7 October 1949. The Berlin Blockade and Airlift (June 1948 to May 1949) had hardened both sides.

Timeline

Historiography

Orthodox accounts (Feis, Schlesinger) treat the doctrine and Plan as defensive responses to Soviet expansion. Revisionist accounts (William Appleman Williams, Tragedy of American Diplomacy, 1959) treat the Plan as an instrument of American export markets and the dollar gap. Post-revisionist accounts (Gaddis, We Now Know, 1997, using Soviet archives) reaffirm the genuine Soviet threat while crediting the Plan with deliberate American economic gain.

Common exam traps

Conflating doctrine and plan. The Truman Doctrine (March 1947) was rhetorical and military; the Marshall Plan (June 1947) was economic. They reinforced each other.

Forgetting the offer to the USSR. The Plan was offered to the whole of Europe. Soviet refusal was a choice, not an exclusion.

Misdating Cominform and Comecon. Cominform September 1947; Comecon January 1949. Both reactive.

In one sentence

The Truman Doctrine (12 March 1947) and the Marshall Plan (5 June 1947) formalised American containment by combining a universal pledge to "support free peoples" with about $13 billion in European economic aid, drove the Soviet response through Cominform (September 1947), the Czech coup (February 1948), and Comecon (January 1949), and produced by April 1949 the two consolidated blocs that defined the Cold War.