Soviet Expansion in Eastern Europe and US Containment

Soviet occupation and the struggle over Eastern Europe

After the Second World War, the political direction of European countries became a source of conflict between the USA and the USSR. Their rival systems mattered: the USA defended capitalism, while the Soviet Union supported communist government. The spread of either system could also extend the influence of the superpower associated with it.

As the Red Army drove back German forces in 1944–1945, it occupied much of Eastern Europe. This military presence gave the USSR considerable influence over post-war governments. Stalin argued that governments friendly to the Soviet Union were necessary for its future security: neighbouring states could provide a protective buffer against attack.

Western leaders saw the establishment of Soviet-dominated governments differently. To them, it threatened national independence and democratic choice, while extending Soviet power. A measure Stalin presented as protection could therefore appear to the West as expansion.

How communist governments consolidated control

Communist control did not emerge everywhere through one sudden takeover. Communists often entered coalition governments, gained control of important institutions and then removed their opponents. Hungarian communist leader Mátyás Rákosi described this gradual process as slicing salami: eliminating opposition bit by bit. These methods became known as salami tactics.

In Hungary, the non-communist Smallholders’ Party won a majority in the 1945 election. Nevertheless, communists gained control of the police and used arrests and intimidation against their rivals. In 1947, Smallholder leader Béla Kovács was deported to the USSR, while Prime Minister Ferenc Nagy was forced to resign after threats against his son. Winning an election did not protect opponents when communists and Soviet forces controlled the means of coercion.

In Romania, Soviet pressure helped install a left-wing government in March 1945. Communists manipulated the 1946 elections and gradually consolidated power. In Poland, arrests and intimidation weakened non-communist opposition, helping communists secure control by 1947. In Bulgaria, communists used executions and imprisonment against political opponents after entering a left-wing coalition in 1945.

These examples show how occupation, political pressure, manipulated elections and police power worked together. Countries could retain their own governments while becoming satellite states, dominated by the USSR.

Czechoslovakia initially had a coalition government in which communists shared power with other parties. In February 1948, communists took control and ended the remaining democratic opposition. This alarmed Western governments because it demonstrated that a country with a surviving parliamentary system could still fall under communist control. It also helped persuade the American Congress to approve Marshall Aid.

Western alarm and the Iron Curtain

In March 1946, Winston Churchill, who was no longer British prime minister, gave a speech at Fulton in the USA. He declared that an ‘iron curtain’ had descended across Europe. This was a metaphor for political division, not a physical barrier. His speech expressed Western alarm about Soviet behaviour and made the emerging division more explicit.

By 1947, Poland, Romania and Bulgaria had Soviet-supported communist governments. American leaders feared that communist influence would spread further. They worried that one country becoming communist could help communist movements in neighbouring countries, making further changes more likely.

However, communism did not always mean obedience to Stalin. Yugoslavia, led by Josip Broz Tito, became a communist state in 1945, but Tito broke with Stalin in 1948. Political ideology and loyalty to a particular superpower were connected, but they were not identical.

Greece, Turkey and the Truman Doctrine

The immediate pressure for American action came from Greece and Turkey. In Greece, the government was fighting communist forces in a civil war and receiving British support. In February 1947, Britain told the USA that it could no longer afford to maintain that support. American leaders also feared Soviet pressure on Turkey.

On 12 March 1947, US President Harry Truman announced that the United States should support ‘free peoples’ resisting ‘armed minorities’ or ‘outside pressures’. He presented American involvement as assistance to people who should be able to decide their own future.

This commitment became known as the Truman Doctrine. It offered political, military and financial assistance to resist the spread of communism. The guiding policy was containment: preventing further communist expansion, rather than trying to overthrow the Soviet government.

American assistance supported the Greek government’s struggle against communist insurgents and strengthened Turkey against Soviet pressure. Its wider significance was the American commitment to intervene: developments abroad were now treated as matters affecting American security and the international balance of power.

The Marshall Plan: using recovery to support containment

The Marshall Plan, proposed in 1947 and implemented from 1948, provided an economic means of supporting containment. It was named after George Marshall, the US Secretary of State, and is also known as Marshall Aid.

American leaders believed that hardship could make communist promises of equality and redistribution more attractive. People facing hunger and unemployment might be more willing to support radical political change. Helping countries rebuild their economies could therefore reduce the appeal of communism.

The intended connection was straightforward: economic assistance → recovery and employment → less support for communist movements. This explains why the Marshall Plan was both a recovery programme and an instrument of foreign policy.

Britain and France were its largest recipients. Aid helped provide food and rebuild damaged housing and economic activity. Assistance also encouraged trade with the United States, while a Technical Assistance Programme sought to improve productivity. The programme contributed to Western European recovery and strengthened American influence, although recovery had other causes too.

The distinction between the two American initiatives is important. The Truman Doctrine established a broad commitment to containment; the Marshall Plan supplied economic assistance that helped put that commitment into practice.

Soviet opposition and the hardening of Europe’s division

The same policy looked very different from Washington and Moscow. American leaders argued that assistance supported recovery and resistance to communist pressure. Soviet leaders regarded it as a threat to their influence. They described the Marshall Plan as ‘economic imperialism’: an attempt to use American wealth to gain power over other countries. This was a Soviet accusation, not an agreed description of the programme.

Stalin prevented Soviet-dominated countries from accepting Marshall Aid. This deepened the division between countries participating in American-backed recovery and those excluded under Soviet pressure.

In 1947, the USSR established Cominform to coordinate communist parties and strengthen their alignment with Soviet policies. Yugoslavia’s expulsion in 1948 illustrated the pressure to follow Stalin’s leadership. American containment and Soviet efforts to tighten control reinforced each other: both sides presented their actions as protective while seeing the other’s actions as threatening.

Germany: from occupation zones to separate states

In 1945, Germany was divided into four occupation zones controlled by the USA, Britain, France and the USSR. Berlin was also divided into four sectors, even though the whole city lay inside the Soviet occupation zone. These were initially occupation arrangements, not two independent German countries.

The wartime allies disagreed over Germany’s future. The USSR prioritised reparations and removed industrial machinery from its zone. Britain and the USA increasingly prioritised economic recovery. They wanted functioning German industry rather than a permanently impoverished country dependent on outside support. Soviet leaders feared the restoration of a powerful Germany and the growth of Western influence there.

In January 1947, Britain and the USA joined their zones economically to create Bizonia. This helped organise recovery but also made the western zones more distinct from the Soviet zone. Marshall Aid strengthened the connection between Western Germany and the American-backed economic system.

In June 1948, the Western powers introduced a new currency into their zones and subsequently into the western sectors of Berlin. Currency reform supported economic recovery, but the USSR saw separate Western arrangements as a threat to its influence and to the economy of its own zone. Germany became a central point of confrontation, leading to the Berlin crisis.

The division became formal in May 1949, when the Western zones formed the Federal Republic of Germany, or West Germany. In October 1949, the Soviet zone became the German Democratic Republic, or East Germany. Disagreements over security, reparations and recovery had helped turn temporary occupation into a lasting political division, with the two states aligned with opposing Cold War blocs.

Soviet expansion, 1945–1948

• Red Army occupation: enabled Soviet pressure on Eastern European governments.
• Methods: coalition governments, control of police, intimidation, arrests and manipulated elections; gradual removal of opposition was called salami tactics.
• Examples: Romania’s manipulated 1946 elections; repression of Hungary’s Smallholders in 1947; communist takeover of Czechoslovakia in February 1948.
• Soviet justification: security through friendly neighbouring governments. Western interpretation: expansion and destruction of democratic choice.
• March 1946: Churchill’s Iron Curtain speech.
• 1948: Tito broke with Stalin; communist Yugoslavia was not obedient to Moscow.

American containment

• February 1947: Britain could no longer maintain support for Greece; the USA also feared Soviet pressure on Turkey.
• 12 March 1947 — Truman Doctrine: political, military and financial assistance against communist expansion.
• Marshall Plan: proposed in 1947; aid began in 1948. Britain and France were the largest recipients.
• Central link: hardship could encourage communism; recovery could weaken its appeal.

Why tensions increased

• American view: aid supported recovery and resistance to communist pressure.
• Soviet view: aid threatened Soviet influence and represented ‘economic imperialism’.
• Stalin blocked Eastern European participation; Cominform, 1947, strengthened coordination and Soviet control.
• The Czechoslovak takeover helped secure American approval of Marshall Aid.

Germany’s division

• 1945: four occupation zones; Berlin had four sectors inside the Soviet zone.
• Disagreement: Soviet reparations and security priorities versus Western economic recovery.
• January 1947: British and American zones combined as Bizonia.
• June 1948: Western currency reform sharpened confrontation.
• May 1949: West Germany established. October 1949: East Germany established.
• Temporary occupation developed into two states aligned with opposing blocs.