How did the KGB and the GRU compete within the Soviet intelligence system?

Within the Soviet intelligence system, the KGB and the GRU maintained distinct roles, though their relationship was characterized by occasional conflict and competition.12

The KGB, established in 1954, functioned as the primary security and intelligence agency, overseeing foreign intelligence, domestic counterintelligence, and internal security. It held a dominant position in the Soviet hierarchy, often acting as the Communist Party's "sword and shield" and maintaining security within the armed forces to monitor for potential traitors.13

In contrast, the GRU served as the chief intelligence directorate of the army's general staff, focusing primarily on military intelligence and operations. While the GRU operated with a degree of independence, the KGB’s broader mandate and political influence allowed it to maintain overall dominance. Historical tensions existed between the two, as the KGB was tasked with watching over other intelligence services, including the military, to ensure loyalty to the regime. Despite these frictions, both agencies were essential instruments of Soviet power, often accessing the same secrets from adversaries and allies alike.132