War of Attrition: Fighting the First World War, Book by William J. Philpott
Villanoa University: America and World War I: A Brief Overview, By Riley Hubbard
Niall Ferguson, The Pity of War
Gallup Poll, citeret fra US Holocaust Museum
Norwich University, Cost of US Wars then and now
Martin Schain, The Marshall plan: fifty years after
American Historical Association, How did Lend Lease get started
The Oxford Handbook of American Military History
Life Magazine, 29. april 1940, »What the U.S.A. thinks«
American Profiles on Capitol Hill: A Confidential Study for the British Foreign Office in 1943
New York Times, 29. juli 1945, FOES ARE CRUSHED; With Hiram Johnson III, Only Shipstead and Langer Vote »No« WORLD OBLIGATION CITED Leaders Say Today's Ratification Is Master Plan, With Military Pacts Secondary United Nations, Milestones 1941-1950
The Economist: What would happen if the US left the UN?
Truman Library Institute: The Berlin Airlift
Norman M. Naimark: Stalin and Europe in the Postwar Period, 1945–53, Journal of Modern European History
W. Phillips Davison: Political Significance of Recognition Via Mass Media–An Illustration from the Berlin Blockade, Public Opinion Quarterly
Roger G Miller: To Save a City: Berlin Airlift, 1948-1949, Air Force History and Museums Program (U.S.)
CRS Report for Congress: Senate Consideration of the North Atlantic Treaty and Subsequent Accessions: Historical Overview
Lawrence A. Kaplan: The United States and the Origins of NATO 1946-1949, The Review of Politics, 1969.
Mark A. Bucknam: The Eisenhower administration and the Suez Crisis, National war College.
Margaret Thatcher Foundation, »Thatcher plotted to block German unification«, 2005
Der Spiegel, »The Germans are back«, 2009
Economics Observatory: »Germany’s reunification: what lessons for policy-makers today«, 2025
National Museum of American Diplomacy, March 1993: Attempts to Broker Peace
Military History Online, »Operation Deliberate Force: NATO’s Air Campaign ends the Bosnian War«
Charles Ingrado (red.), Confronting the Yugoslav Controversies: A Scholars' Initiative, 2013
US Department of War, Fact Sheet on U.S. Security Assistance for Ukraine (Roll Up) As of April 21, 2022
Anne Applebaum, What If the U.S. Hadn’t Helped Ukraine?, The Atlantic, december 2022