Franklin Roosevelt's good neighbour policy, coming in the wake of decades of US intervention in Central America, and following a lengthy US military occupation of Nicaragua, marked a significant shift in US policy towards Latin America. Its basic tenets were non-intervention and non-interference. The period was exceptionally significant for Nicaragua, as it witnessed the creation and consolidation of the Somoza government - one of Latin America's most enduringauthoritarian regimes, which endured from 1936 to the sandinista revolution in 1979. Addressing the political, diplomatic, military, commercial, financial, and intelligence components of US policy, Andrew Crawley analyses the background to the US military withdrawal from Nicaragua in the early 1930s. He assesses the motivations for Washington's policy of disengagement from international affairs, and the creation of the Nicaraguan National Guard, as well as debating US accountability for what the Guard became under Somoza. Crawley effectively challenges the conventional theorythat Somoza's regime was a creature of Washington. It was US non-intervention, not interference, he argues, that enhanced the prospects of tyranny.