Soviet espionage refers to the intelligence-gathering activities conducted by the Soviet Union during the Cold War. This involved a network of spies and informants who infiltrated various governments, military organizations, and industries to obtain sensitive information. The KGB, the Soviet Union's main security agency, played a crucial role in these operations, employing tactics such as surveillance, recruitment of double agents, and the use of technology. The primary goal of Soviet espionage was to gain an advantage over rival nations, particularly the United States and its allies. Notable espionage cases included the theft of atomic secrets and the infiltration of political circles. These activities significantly influenced international relations and contributed to the tensions of the Cold War era.