Berlin

Berlin is the capital of Germany, a city of approximately 3.7 million people in northeastern Germany. Divided after World War II into American, British, French, and Soviet sectors, Berlin existed as a physically divided city from the construction of the Berlin Wall on August 13, 1961, until the wall's fall on November 9, 1989. During this period, West Berlin was an island of Western-aligned territory surrounded by East German territory, making it one of the most strategically consequential and intelligence-dense locations in the world.¹

CIA Berlin Base

The CIA's Berlin Base, operating from the American sector, was one of the agency's largest and most important Cold War stations. In the early 1950s, Bill Harvey, one of the CIA's most aggressive Cold War operators, ran Berlin Base and managed Operation Gold (1955-1956) - the CIA-MI6 project to dig a tunnel from West Berlin into East Berlin to tap Soviet military communication cables. The tunnel operated for approximately eleven months before the KGB, which had been tipped off by British mole George Blake, allowed it to be discovered in April 1956 in a manner designed to protect Blake's identity.²

Berlin Base also managed defector operations, agent recruitment along the East-West border, and analysis of Soviet military movements. The base's access to East-West border crossing points made it uniquely positioned for human intelligence collection and defector handling. James Angleton, the CIA's counterintelligence chief, used Berlin as a key location in his obsessive mole-hunting operations.¹

KGB Karlshorst

The KGB's East Berlin headquarters was located in the Karlshorst district, in a compound that had served as Soviet military headquarters since the German surrender was signed there on May 8, 1945. Karlshorst housed the KGB's Stasi liaison and directed operations against West Berlin and Western targets across Germany. The complex is now the German-Russian Museum. Soviet intelligence officers assigned to Karlshorst operated under diplomatic cover from the Soviet Embassy in East Berlin.¹

La Belle Disco Bombing and Libya

On April 5, 1986, the La Belle discotheque in West Berlin was bombed, killing two American soldiers and a Turkish woman and wounding 200 others. American and British signals intelligence intercepted communications between Libyan intelligence and its East Berlin embassy before and after the attack that attributed responsibility to Muammar Gaddafi's government. President Ronald Reagan cited the intelligence intercepts as justification for the April 15, 1986 bombing of Tripoli and Benghazi, Operation El Dorado Canyon. The operation required use of British bases with Margaret Thatcher's approval.²

Wall and Reunification

The Berlin Wall, built overnight beginning August 13, 1961, divided the city and stopped the mass emigration of East Germans through Berlin to the West. Approximately 140 people were killed attempting to cross the Wall over its 28-year existence. The Wall fell on November 9, 1989, following the East German government's announcement that citizens could cross freely; crowds demolished sections of the Wall over subsequent days. Germany reunified on October 3, 1990, with Berlin restored as the national capital.¹