During Mielke's tenure, the Stasi's operations beyond East Germany were overseen by Markus Wolf and the Hauptverwaltung Aufklärung (MfS-HVA).

Mielke and Wolf provided money, training, and surveillance equipment to help build Pro-Soviet secret police forces in Fidel Castro's Cuba, Baathist Syria, Sandinista-ruled Nicaragua, Mengistu Haile Mariam's Ethiopia, Idi Amin's Uganda, Kwame Nkrumah's Ghana, and South Yemen.

After the opening of Stasi archives, it was revealed that West Germany was riddled with MfS-HVA moles.
In what John Koehler has dubbed, "The Invisible Invasion", some West German citizens collaborated out of Marxist beliefs, but others were recruited through blackmail, greed, career frustrations, or sexual favors from Stasi operatives.

Another tactic was for Stasi military advisers assigned to African and Middle Eastern countries to request the arrest of West German tourists.
Local police would then turn the prisoner over to the Stasi agent, who would offer the West German a choice between espionage or incarceration.

Senior politicians from the Social Democratic Party of Germany, the Free Democratic Party of Germany, and the Christian Democratic Union were exposed and, when still alive, prosecuted.

Mielke and Wolf also seriously compromised West Germany's police departments, foreign and domestic intelligence services, diplomatic corps, military-industrial complex, and journalistic profession.

The Stasi compromised the United States military and diplomatic presence in West Germany.

The most damaging American to spy for the Stasi was United States Army Sergeant James Hall III, who volunteered his services to Soviet and East German intelligence in November 1981.

Sergeant Hall sold the Stasi 13,088 pages of classified documents, including detailed information about Project Trojan, a worldwide electronic network with the ability to pinpoint armored vehicles, missiles and aircraft by recording their signal emissions during wartime and the complete National SIGINT Requirements List (NSRL), a 4258-page document about NSA operations at home and abroad.

In 1988, Sergeant Hall was tricked into confessing his espionage career to an undercover FBI Special Agent named Dmitri Droujinsky, a Russian-American who was posing as an agent of the KGB.
When news of Sergeant Hall's arrest became public, one Washington intelligence official called the breach, "the Army's Walker Case."
During Mielke's tenure, the Stasi's operations beyond East Germany were overseen by Markus Wolf and the Hauptverwaltung Aufklärung (MfS-HVA).
Mielke and Wolf provided money, training, and surveillance equipment to help build Pro-Soviet secret police forces in Fidel Castro's Cuba, Baathist Syria, Sandinista-ruled Nicaragua, Mengistu Haile Mariam's Ethiopia, Idi Amin's Uganda, Kwame Nkrumah's Ghana, and South Yemen.
After the opening of Stasi archives, it was revealed that West Germany was riddled with MfS-HVA moles. In what John Koehler has dubbed, "The Invisible Invasion", some West German citizens collaborated out of Marxist beliefs, but others were recruited through blackmail, greed, career frustrations, or sexual favors from Stasi operatives.
Another tactic was for Stasi military advisers assigned to African and Middle Eastern countries to request the arrest of West German tourists. Local police would then turn the prisoner over to the Stasi agent, who would offer the West German a choice between espionage or incarceration.
Senior politicians from the Social Democratic Party of Germany, the Free Democratic Party of Germany, and the Christian Democratic Union were exposed and, when still alive, prosecuted.
Mielke and Wolf also seriously compromised West Germany's police departments, foreign and domestic intelligence services, diplomatic corps, military-industrial complex, and journalistic profession.
The Stasi compromised the United States military and diplomatic presence in West Germany.
The most damaging American to spy for the Stasi was United States Army Sergeant James Hall III, who volunteered his services to Soviet and East German intelligence in November 1981.
Sergeant Hall sold the Stasi 13,088 pages of classified documents, including detailed information about Project Trojan, a worldwide electronic network with the ability to pinpoint armored vehicles, missiles and aircraft by recording their signal emissions during wartime and the complete National SIGINT Requirements List (NSRL), a 4258-page document about NSA operations at home and abroad.
In 1988, Sergeant Hall was tricked into confessing his espionage career to an undercover FBI Special Agent named Dmitri Droujinsky, a Russian-American who was posing as an agent of the KGB. When news of Sergeant Hall's arrest became public, one Washington intelligence official called the breach, "the Army's Walker Case."
Erich Mielke