World War, 1939-1945 -- United States. World War, 1939-1945 -- Diplomatic history. Isolationism -- United States -- History -- 20th century. Intervention (International law) -- History -- 20th century. Political culture -- United States -- History -- 20th century.

Special operations (Military science) -- United States -- History -- 21st century Terrorism -- Prevention -- United States -- Government policy -- History -- 21st century Targeted killing -- United States -- History -- 21st century Intelligence service -- United States -- History -- 21st century United States -- History, Military -- 21st century