The Building of the Berlin Wall

How One Germany Became Two: Occupation, Division, and the Birth of Two States

When Nazi Germany surrendered unconditionally on 8 May 1945, Germany ceased to exist as a sovereign state. The four Allied powers (the United States, the United Kingdom, France, and the Soviet Union) formalised the extinction of the German Reich through the Berlin Declaration of 5 June 1945 and divided the territory into four military occupation zones. The United States took the south, Britain the north-west, France the south-west, and the Soviet Union the east. Berlin, though lying deep inside the Soviet zone, was itself partitioned into four sectors under quadripartite control. In principle the Allied Control Council governed Germany as a whole; in practice each occupying power ran its own zone independently.

Postwar Germany stood on a material and human catastrophe. Sixty-six percent of dwellings in Cologne and 93 percent in Düsseldorf were uninhabitable; the economy had ground to a halt. Between 12 and 14 million ethnic Germans were expelled from the former eastern territories and from countries across Central and Eastern Europe, and around two million died en route. At the Potsdam Conference (July–August 1945), the victors agreed to denazify, demilitarise, and decentralise Germany, and to extract reparations.

But the occupiers' visions for Germany had diverged from the start. In its zone the Soviet Union dismantled roughly 30 percent of industrial capacity and shipped it home, even tearing up the second track from dual-track railway lines. In April 1946, the Soviet occupation authorities forced the Communist Party of Germany (KPD) and the Social Democratic Party (SPD) in their zone to merge into the Socialist Unity Party of Germany (SED). Officially a voluntary union, the merger was carried out under heavy Soviet pressure. The KPD faction, led by Walter Ulbricht, held the real levers of power from the start.

The Western occupiers prioritised economic recovery and democratisation. In January 1947 the American and British zones merged economically into the 'Bizone'; the Marshall Plan, announced that June, channelled massive funds into the western zones' revival. The Soviet Union denounced the Marshall Plan as 'American imperialist economic aggression' and blocked participation by all Eastern European states. In June 1948 the Western zones introduced the Deutsche Mark through currency reform; the Soviets responded by issuing their own separate currency for East Berlin and the Soviet zone.

This conflict erupted in June 1948 when Stalin blockaded all road, rail, and canal access to West Berlin. The three Western powers countered with the Berlin Airlift: over 15 months, more than 278,000 flights delivered 2.33 million tons of supplies. The Soviet Union lifted the blockade in May 1949, but by then the division of Germany had become irreversible.

On 23 May 1949 the three Western zones merged into the Federal Republic of Germany (West Germany). On 7 October 1949 the Soviet zone became the German Democratic Republic (East Germany). Two German states had been born on paper; in reality, two antagonistic systems now confronted each other on the front line of the Cold War. And Berlin, a quadripartite city marooned deep inside East German territory, remained the one place where those two systems touched.

A Country on the Run: The Hemorrhage That Began on Day One

The GDR was already losing people on 7 October 1949, the day it was founded. The problem did not begin with the regime; it predated it. Officials in the Soviet occupation zone had used the term Republikflucht, 'desertion from the republic,' almost immediately after the war to describe Germans moving westward into the American, British and French zones. The name stuck after 1949, and by 1961 roughly 3.5 million people, close to one-fifth of the East German population, had fled west. The SED tried to stop the outflow while simultaneously stigmatizing the act of leaving itself. A 1955 propaganda booklet for party agitators branded those who left as guilty of 'political and moral backwardness and depravity,' people who abandoned a country 'in which the seed for a new and more beautiful life is sprouting' for the sake of a few tempting job offers.

But the numbers spoke louder than the pamphlet. Some 187,000 left in 1950 and 165,000 in 1951, then the figure jumped to 331,000 in 1953. In the first six months of that year alone 226,000 fled, driven by the increasingly paranoid repression of Stalin's final phase and by the fear that followed the Soviet army's bloody suppression of the June uprising. West Germany accepted these arrivals as 'Soviet zone refugees' under its Federal Expellee Law, which meant that simply reaching the West guaranteed support. When the inner German border was sealed with barbed wire in 1952, the flow that had once crossed it simply rerouted through Berlin. The sector boundary of the four-power city could not easily be closed, so the whole city became the escape loophole. A new passport law of December 1957 made legal emigration harder, and backfired: the share of refugees passing through West Berlin, around 60 percent, rose past 90 percent by the end of 1958.

What turned this into a crisis of the regime's existence rather than a mere demographic problem was that the emigrants were younger and better educated than the average. Engineers, technicians, doctors, teachers and lawyers left in disproportionate numbers, a brain drain that by the early 1960s had cut the working-age population from 70.5 percent of the prewar level to 61 percent. The Soviets understood that the hemorrhage was eroding their satellite's credibility. Ambassador Mikhail Pervukhin reported that Berlin's 'open and essentially uncontrolled border between the socialist and capitalist worlds' prompted people to compare the two halves of the city, a comparison that 'unfortunately does not always turn out in favour of Democratic East Berlin.' The decisive warning came in a letter from Yuri Andropov on 28 August 1958. Then in charge of relations with socialist countries' parties, Andropov told the Central Committee that the share of intelligentsia among the refugees had risen 50 percent and that 'the flight of the intelligentsia has reached a particularly critical phase.' Against the East German leadership's claim that people were leaving for higher living standards, Andropov argued on the basis of the refugees' own testimony that the motives were political rather than material. While the regime offered economics as the excuse, the people who left were rejecting the regime itself.

The Ultimatum, and the One-Sided Clash in Vienna

What Khrushchev delivered to the West in November 1958, calling West Berlin a 'malignant tumor,' was an ultimatum. Overconfident in Soviet military strength after the Sputnik success, and alarmed that West Germany had joined NATO and was moving toward nuclear-capable launchers, he decided to use Berlin as leverage. After a 10 November speech demanding Western withdrawal within six months, a 27 November note to the United States, Britain and France demanded that West Berlin become a 'demilitarised free city' and declared the 1944 Four-Power agreement on joint administration 'null and void.' The core demand: if no German peace treaty was signed within six months, the Soviet Union would sign one separately with East Germany and hand control of West Berlin's access routes to a government the West did not even recognise. The Western garrisons would then enter West Berlin only with East German permission.

The West read the note as an ultimatum but did not close ranks. France favoured calling Khrushchev's bluff; Eisenhower was hard-line at first, then saw that negotiation could be made without looking weak; Britain plainly wanted to avoid war. The three powers set up a secret planning group, LIVE OAK, to prepare land and air plans guaranteeing access to West Berlin. From NATO's perspective the city had no military value, but Eisenhower conceded it was a case 'in which our political posture requires us to assume military postures that are wholly illogical.' In the end Khrushchev repeatedly extended the deadline, withdrew it in May 1959, and the Camp David meeting and Geneva foreign ministers' conference closed without agreement. By early 1961 the Soviets were waiting out the American presidential election to reopen the question with the new president.

On 4 June 1961 Kennedy and Khrushchev met for the first time, in Vienna. Kennedy had hoped a personal meeting could dissolve the standoff, but his advisers feared he underestimated Khrushchev. Reading Kennedy as shaken by the Bay of Pigs failure, Khrushchev pressed the Soviet line that a reunified Germany would repeat its war, and warned of a separate peace treaty with East Germany. When Kennedy answered that American forces held Berlin 'by contractual rights,' Khrushchev retorted that the treaty would nullify the Four-Power agreement and, if the US refused an interim arrangement, the Soviet Union would sign it 'in December.' In the ideological argument Khrushchev outmatched the man who insisted that withdrawing would shatter allied faith in American commitments. Kennedy told a reporter afterwards it was 'the worst thing in my life. He savaged me,' while Khrushchev sized up Kennedy as a young man who could be pushed around. Vienna sent the two men away with opposite conclusions: Kennedy resolved to prove American credibility with strength, Khrushchev convinced he could settle Berlin by December. That illusion, weeks later, would put a wall into Ulbricht's hands.

Where the Denial Was Spoken, and Six Weeks of War Preparations

On 15 June 1961 an international press conference in East Berlin's House of Ministries drew some 300 journalists. Annamarie Doherr of the West German Frankfurter Rundschau asked Ulbricht a question: under the Soviet plan to turn West Berlin into a "free city," would that mean a state border at the Brandenburg Gate? Ulbricht answered: "Niemand hat die Absicht, eine Mauer zu errichten" (No one has the intention of erecting a wall). It was the first time the word Mauer (wall) appeared in this context, and when the wall went up two months later that single sentence became the symbol of the GDR leadership's public lying.

But reading the denial only as perjury misses how those six weeks actually unfolded. At the same conference Ulbricht praised the Soviet German peace-treaty plan and demanded West Berlin's neutralization; Doherr's headline the next day read "Ulbricht demands complete air sovereignty." What the East German leadership wanted was to break Berlin's four-power status and take control of the border, with the refugee problem folded inside that goal. They denied the word "wall" but never concealed the plan for a border.

On the Western side, Kennedy spent the six weeks after being battered by Khrushchev in Vienna narrowing the scope of American commitments. The Soviets denied the validity of the occupation regime for all of Berlin, but the United States itself defined three "vital interests," each tied only to the city's western half: the presence of Western troops in West Berlin, the security and viability of the western sectors, and access to them. The boundary between the eastern and western sectors went unmentioned. That narrowed position was made concrete on the night of 25 July in a nationwide television address. Kennedy asked Congress for $3.25 billion in additional military spending, six new Army divisions and two Marine divisions, a tripling of the draft, and a call-up of reserves. "We seek peace, but we shall not surrender." Khrushchev, vacationing in Sochi on the Black Sea, was angered and told Kennedy's disarmament adviser John McCloy, who happened to be in the Soviet Union, that this buildup threatened war.

So the six weeks were spent preparing along two parallel tracks: in East Berlin, barbed wire and concrete posts quietly stockpiled through dispersed purchases; in Washington, military spending drawn up on something close to a war footing. Measured against what actually happened at dawn on 13 August, Ulbricht's denial was a lie, but it was also the mark left where two different calculations, each trying to hold a middle state short of both war and wall, passed through each other, drawn out by a single question that had put its finger exactly on the core of the matter.

Who Would Lay the Iron Ring: Approval in Moscow, and a Sunday-Night Date

The word 'wall' first appeared not in the Moscow conference room but over a telephone line two days earlier. On 1 August, Khrushchev and Ulbricht spoke for more than two hours, moving from the economic situation to 'the sealing of the border.' Khrushchev gave the instruction this way: 'Let us lay an iron ring around Berlin. The explanation is easy: we are threatened with war and we do not want spies entering our midst. The Germans will understand this explanation.' What he added next revealed the character of the decision: 'Our troops should lay down the ring, but your troops should control it.' The Soviet Union wanted the operation draped in the clothes of a collective Warsaw Pact decision, yet the division of labour was arranged so that it was East Germany, specifically Ulbricht's regime, that would be seen pointing guns at its own people. Khrushchev also demanded total secrecy: 'Before instituting the new border regime you should not explain anything, since this would only increase the refugee exodus.' This was the same line Ulbricht had used on 15 June, when he declared that no one intended to build a wall. The lie did not end at that press conference; it was planned as part of the operation.

Khrushchev had long opposed a physical barrier, knowing a wall would read as communism's confession that it must imprison its own people. At first he was prepared to approve only a barbed-wire obstacle for Ulbricht, not concrete. But by the summer of 1961 his attitude changed. In the American historian Hope Harrison's phrase, the tail wagged the dog: what moved the Soviet dog was the East German tail, Ulbricht's relentless pressure. Ulbricht had been demanding a border closure since 1953, and as Khrushchev's peaceful-coexistence line produced nothing on the German question, he complained openly. The China factor piled on top: Mao was denouncing peaceful coexistence as 'bourgeois pacifism,' and Khrushchev, who knew the hard-line Ulbricht was close to Beijing, feared that softness in Berlin would cost him support inside the bloc. The wall was thus not mere border control but a product of power relations inside the communist camp.

From 3 to 5 August a secret meeting of the Warsaw Pact states' communist party first secretaries convened in Moscow. There Ulbricht formally requested the Berlin border closure and this time won the allies' backing. There were exceptions, such as the Albanian representative Ramiz Alia, but the core decision had already been settled in the 1 August phone call. The meeting agreed to the wall and promised economic aid to East Germany should the West retaliate with sanctions. According to the record, Khrushchev left it to Ulbricht to choose the moment of closure. The East Germans had aimed from the start for a Sunday morning, when Western officials would respond slowly over the weekend and many Berliners would be out of the city. And so the date was set for the night of 12 to 13 August.

On the morning of 7 August, Ulbricht reported the Moscow results to an extraordinary SED Politburo meeting, and Minutes No. 39/61 formally fixed the date. Meanwhile Berlin went on looking as if nothing would happen. That very weekend, 6-7 August, the Marienfelde refugee centre registered 3,268 arrivals. A leadership that had already decided to build a wall was still counting the escapees up to the last moment. The decision was kept rigorously secret, and Western intelligence, while noting troop movements, warned only days later that a border closure might be coming. Not one slab of the wall yet stood, but everything that would be placed there had already been decided in the meeting rooms of Moscow and East Berlin.

The First Day of Barbed Wire: Human Rights Protested, Treaties Stayed Silent

The decisive fact at dawn on 13 August 1961 was not concrete but the sudden end of movement. East German People’s Police and border guards cut roads, railways, and tram lines and stretched barbed wire across them. On Bernauer Strasse, building entrances lay in East Berlin while the pavements lay in West Berlin, and residents tried to jump from windows before East German police stopped them. From the start, this was less a defensive operation against a Western invasion than an administrative and police operation to close the last route by which GDR citizens could leave. The East German government called it the “Anti-Fascist Protection Rampart.” Its internal logic was that West German espionage and political agitation threatened socialist construction, so securing the border meant securing the state and peace. But the price demanded by that logic was the freedom of workers and families to move. The state did not persuade its citizens to stay. It made departure impossible.

The Western calculation was to separate outrage from military action. US Secretary of State Dean Rusk condemned the measures publicly, but, as a US mission cable from Berlin on 13 August recorded, Washington judged that closing movement on the East Berlin and GDR side had not directly blocked the Western powers’ rights to station forces in Berlin or their access routes to West Berlin. In Rusk’s phrase, the Wall was not a “shooting issue.” If American tanks pushed through the wire, a clash with East German police could become a clash with Soviet forces, turning an attempt to defend Berlin’s legal rights into a trigger for nuclear war. The secret record also shows a colder calculation. Llewellyn Thompson, the US ambassador in Moscow, wrote that it might be in the long-term interest of both the United States and West Germany for potential refugees to remain in East Germany. The public language of human rights and the private calculation of regime stability were contradictory, but they operated at the same time.

The shock in West Berlin was not an abstract diplomatic matter. Residents felt that the West had abandoned them, and within days the United States had to send Vice President Lyndon Johnson and additional troops to repair morale. On 18 August, Chancellor Konrad Adenauer told the Bundestag that the Wall was a direct violation of human rights and Berlin’s Four-Power status. Yet he chose negotiation rather than an immediate attempt to remove it by force. That choice did not approve the Wall. It condemned the violence East Germany had inflicted on its own residents while calculating the cost of preserving Western legal rights and a viable West Berlin. The first day therefore left an uncomfortable conclusion. The Wall was East Germany’s coercive closure, not simply Western inaction, but the West was unwilling to wage war to stop a violation of human rights. In that gap, barbed wire divided people’s lives before it settled the city’s legal boundaries.

The Promise Behind the Wall, and the Limit at the Tanks

After the Wall went up, what West Berliners feared most was not concrete but the feeling of abandonment. When Vice President Lyndon B. Johnson and General Lucius D. Clay arrived on 19 August, hundreds of thousands gathered at Schöneberg Rathaus. Johnson promised that the United States would guarantee West Berlin's freedom and its ties to the Western world, but that promise did not mean that Washington would demolish the Wall. American policy had narrowed its vital interests to three points: the presence of Western troops in West Berlin, the city's viability, and access to it. Washington could protest East Germany's imprisonment of its own population, but the measure had not yet cut the Western powers' legal access rights. The distinction was cold, but it arose from the calculation of how to avoid war. An armed attempt to tear down the barrier could have produced a clash with East German forces, then a battle with Soviet forces, and ultimately nuclear war. Western solidarity therefore reassured the city's residents without promising the Wall's removal, and it did not change the fact that East German citizens had lost their exit.

That limit became more dangerous between 22 and 27 October. When East German border guards tried to inspect the identity papers of Allied soldiers and officials at Checkpoint Charlie, the United States treated the move not as an ordinary GDR regulation but as a Soviet-backed test of Allied access rights in Berlin. On Clay's instructions, American officers were sent through without presenting their papers. On the afternoon of 27 October, ten Soviet tanks moved up Friedrichstrasse and took positions opposite the American tanks. By midnight the Soviet force had grown to thirty tanks, and the two sides faced each other at roughly one hundred yards, guns aimed across the checkpoint. This was not merely a symbolic contest over the Wall. It was a tank-borne question about who could exercise the rights of the victorious powers in Berlin.

The two governments nevertheless tried to separate the field commanders' claims of principle from the responsibilities of nuclear powers. John F. Kennedy sought a withdrawal through a secret channel while refusing to retreat publicly; Nikita Khrushchev likewise had reason to avoid the appearance that the Soviet Union had directly driven the Western powers back. The Soviet tanks began withdrawing on the morning of 28 October, followed by the American tanks. The later State Department record preserves two explanations without settling which was decisive: that Kennedy and Robert Kennedy worked through the Soviet intermediary Georgi Bolshakov, or that Khrushchev ordered the withdrawal to save the American side's face. The outcome was neither a Western surrender nor an East German victory. The West preserved the principle of access but did not restore freedom of movement; the Soviet Union protected the GDR's Wall without crossing the line into direct war with the United States. The Wall remained, and the peace around it rested not on the full recovery of rights but on a boundary between risks that both sides could still bear.

What the Wall settled, what it did not, and the verdict the archives changed

The Wall did not solve the 1961 crisis so much as seal its central disputes in a different form. From the GDR leadership's standpoint, closing the border was an emergency measure to protect the productive capacity and survival of a socialist state. The mass exodus through West Berlin nearly stopped, and the regime avoided an immediate collapse of its workforce and administrative control. The Soviet leadership could also separate the problem of Western troops remaining in West Berlin from the problem of East German emigration. The West condemned the Wall as a violation of human rights, yet secret State Department analyses judged that, so long as the measure did not trigger revolt or war, ending the refugee flow might serve Western interests in the long run. Public protest and military non-intervention therefore coexisted. The West promised to defend access to and its garrison in West Berlin, not to use force to restore East Berliners' freedom of movement. This calculation avoided nuclear war, but it effectively removed East German citizens' liberty from the bargaining table.

That did not resolve the GDR's underlying problems. The state could keep people inside, but it could not remove the political distrust and everyday comparisons that had made people want to leave. The Wall criminalized escape and institutionalized routine state violence through fences, watchtowers, and armed guards. Its collapse in 1989 was not simply the physical failure of one barrier. It resulted from the convergence of a citizens' movement demanding freedom to travel, the opening of borders elsewhere in Eastern Europe, and Mikhail Gorbachev's refusal to order military intervention in an allied state. What the event settled, then, was not the permanence of German division, but a provisional arrangement in which the great powers managed that division to avoid war.

Historians still do not have a completely closed verdict on who made the Wall. Early Cold War accounts produced by Western and East and West German governments placed Soviet pressure over Berlin and superpower rivalry at the center, portraying Ulbricht as Moscow's executor. After 1991, the opening of East German and Soviet records led scholars including Hope M. Harrison to reconstruct the decision differently: Ulbricht, who bore the most direct economic and political costs of the refugee exodus, pressed hardest for closure, while Khrushchev approved it and incorporated it into his own Berlin strategy. A contrary interpretation stresses the Soviet Union's final authorization, the deterrent power of Soviet troops, and the limits the Western governments imposed on themselves, arguing that Moscow's responsibility cannot be minimized. The remaining question is not whether the Wall was necessary. The documents make the choice comparatively clear: the regime chose confinement over reforms that might persuade citizens to stay. The dispute concerns who proposed that choice first, and how responsibility was divided between East Berlin and Moscow.