The Berlin Blockade, Airlift and the Birth of NATO
Why Berlin Was the Pressure Point
Berlin in 1948 was a strange place. The city sat 160 kilometres inside the Soviet zone of occupation, but Berlin itself was divided into four sectors run by the Soviets, Americans, British and French. Western access depended on three air corridors agreed in 1945, plus road, rail and canal routes that had no comparable treaty cover. Stalin had a city the West needed but could not easily reach. Truman had a half-city full of West Berliners who increasingly rejected the Soviet model. The fuse was lit when the Western powers acted on the economy.
The Berlin Blockade ran from 24 June 1948 to 12 May 1949. Stalin closed all road, rail and canal access into West Berlin in response to the introduction of a new Western currency. The West responded with the Berlin Airlift — flying supplies into Tempelhof, Gatow and Tegel airports for nearly eleven months.
The Currency Trigger
By spring 1948 the Western occupiers had decided to merge their three zones economically and introduce a new, stable currency — the Deutsche Mark. The currency was launched in the Western zones on 20 June 1948. Three days later it was extended to the Western sectors of Berlin. Stalin saw this as a hostile act: a working economy in West Germany was the foundation of a future West German state, and a working economy in West Berlin would magnetise East Germans toward the Western system. He retaliated with a complete blockade.
From midnight on 24 June 1948, all road, rail and canal traffic into West Berlin was stopped. Electricity from the East was cut. The Berlin Blockade left a city of about 2.5 million people in the Western sectors with roughly six weeks of food and fuel stockpiled. Stalin’s assumption was simple: faced with a choice between abandoning Berlin or risking war, the West would abandon Berlin.
The Airlift
Truman refused both options. Direct military force could trigger a third world war; abandoning Berlin would gut Western credibility across Europe. Instead, the USA, Britain and France used the air corridors. The Berlin Airlift began on 26 June. At its peak in spring 1949, a transport aircraft was landing in West Berlin every ninety seconds, around the clock. Over 277,000 flights delivered roughly 2.3 million tonnes of food, coal and supplies. Coal was the surprising bulk — Berlin in winter could not survive on food alone.
The cost was real. In all 101 people died during the airlift, including 40 British and 31 American personnel, and the operation strained Western air capacity. But the political message was sharper than the cost. The Soviets had assumed the West would not undertake an airlift at scale; the West had done so. By the spring of 1949 it was clear that Berliners were not starving and that Soviet pressure had failed. On 12 May 1949 Stalin lifted the blockade. The airlift continued for another four months, building stockpiles in case Stalin tried again.
Soviet fighters could have shot down American transport aircraft over the corridors at any point during the airlift. They did not. The reason was the bomb. The USA still had the only working atomic weapons in the world and a small but functional fleet of B-29 bombers based in Britain. Stalin calculated that shooting down a US transport would risk a war he could not yet win. The airlift therefore worked because of a balance: the West would not invade with ground forces, and the Soviets would not engage in the air. This was the first practical lesson of the Cold War — both sides learned to push, but to stop short of the line that would trigger nuclear retaliation.
The Birth of NATO
The blockade convinced Western governments that the postwar arrangements were not enough. In Washington, London and Paris, planners agreed that Western Europe could not be defended by ad hoc coordination. On 4 April 1949 — while the airlift still ran — twelve countries signed the North Atlantic Treaty in Washington. The signatories were the USA, Canada, Britain, France, Italy, Belgium, the Netherlands, Luxembourg, Norway, Denmark, Iceland and Portugal. Article 5 of the treaty committed each member to treat an armed attack on any one as an attack on all.
The North Atlantic Treaty Organization — NATO — was the first peacetime US military alliance with European powers. For the USA it formalised the doctrine of containment with a defence guarantee. For Western Europe it brought American troops, air bases and (after 1951) the integrated command system run from SHAPE in Paris. For Stalin, NATO confirmed what Cominform had argued in 1947: the West was not just a political bloc but a military one. The Soviet response — the Warsaw Pact — would follow in 1955, after West Germany joined NATO.
The blockade settled the German question by accident. As long as the Allies treated Germany as a single occupied country with four zones, formal partition was avoided. Once Stalin had tried to starve out the Western sectors, no Western leader would trust the Soviet zone in any joint arrangement. On 23 May 1949, eleven days after the blockade ended, the three Western zones became the Federal Republic of Germany (West Germany), with its capital at Bonn. On 7 October 1949 the Soviet zone became the German Democratic Republic (East Germany), with its capital at East Berlin. The four-zone Germany of Yalta and Potsdam was gone — replaced by two German states tied to opposing alliances.
NATO was founded by twelve countries in Washington on 4 April 1949. Article 5 commits each member to treat an attack on one as an attack on all. The Federal Republic of Germany (West Germany) was created on 23 May 1949 and the German Democratic Republic (East Germany) on 7 October 1949 — the four-zone Germany was permanently divided.