Abstract The Soviet military intervention in Afghanistan in December 1979 sparked severe tensions in East-West relations. Great Britain, the United States, and other Western allies sought to counter the Soviet invasion by providing clandestine assistance to the Afghan resistance groups, collectively known as the mujahidin. Looking back, some analysts have argued that this covert action was a short-sighted strategic blunder, but these assertions rely heavily on hindsight and do not take account of the perceptions of policymakers at that time. This article examines the British response to the Afghan crisis of 1979, focusing in particular on the decision-making process within Margaret Thatcher's government. The article shows that British Foreign Office and intelligence officials were generally accurate in their assessments of the factors that prompted the Soviet Union to intervene. These officials concluded that the invasion had been a last resort by the USSR to prevent its client regime in Kabul from being overthrown by the mujahidin, rather than a first step toward regional conquest. However, Prime Minister Margaret Thatcher, her Cabinet, and Whitehall officials feared that the Soviet takeover of Afghanistan would destabilize fragile states such as Iran and Pakistan. They believed the West was obliged to respond. Covert action became the default response for the UK because it was the only feasible means of demonstrating opposition to the USSR's intervention. Thatcher's decision to aid the mujahidin was made shortly after the Soviet invasion, but it took time for the British to establish contacts with the Afghan resistance and identify which factions were worthy of support.
Geraint Hughes (Thu,) studied this question.