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American belligerency
The formal participation of the United States in the First World War from April 1917, supported by military deployment, industrial mobilization, finance, shipping, and an expanded federal state.
Global power
A state able to shape political, military, economic, and diplomatic outcomes beyond its immediate region through sustained influence and international commitments.
Good Neighbor Policy
The United States policy associated with Franklin D. Roosevelt that emphasized nonintervention, consultation, reciprocal trade, cultural diplomacy, and hemispheric cooperation in relations with Latin America.
Manhattan Project
The code name for the US government programme to build an atomic bomb during the Second World War. Led by General Leslie Groves and physicist Robert Oppenheimer, the project was centred at Los Alamos, New Mexico, and involved thousands of scientists, engineers, and support staff. It produced the bombs dropped on Hiroshima and Nagasaki in August 1945.
Wilsonian internationalism
A programme linking American power to open diplomacy, freer trade, national claims, collective security, international law, and a permanent League of Nations.