Burrowing deep into the national archives in Brazil, Cuba, and Panama, Herman has produced a splendid, well-balanced history of an extraordinary but seldom studied period in inter-American relations. She pushes back against the still prevalent academic caricature of the United States as an all-powerful imperial actor, aligning herself instead with a younger generation of scholars that has emphasized Latin American agency and the ability of Latin Americans to astutely bargain with Washington....Herman deftly demonstrates how onsite U.S. commanders and diplomats cooperated with local authorities to find informal, flexible solutions to potentially tricky issues....Such pragmatic accords successfully managed the inherent tensions between international security cooperation and national sovereignty, enabling a brilliant if brief chapter of solidarity in the Western Hemisphere.