Key term for AQA GCSE History, used in The Cold War in Asia (1950–1975).
A geographical boundary defining areas the US considered vital and would defend with direct military force.
Defense Perimeter appears in AQA GCSE History revision content for Wider World Depth Studies, especially The Cold War in Asia (1950–1975) and Causes of the Korean War.
Create a free account to access AQA GCSE History revision notes, track progress, and practise related key terms.
