24 February – Walter Hines Page, United States ambassador to the United Kingdom, is shown the intercepted Zimmermann Telegram, in which Germany offers to give the American Southwest back to Mexico, if Mexico will take sides with Germany when the United States declares war on Germany.[2]
^Constance B. Hintz; E. W. Egan; Leonard F. Wise, eds. (1976). Kings, Rulers, and Statesmen. Sterling Publishing Company. p. 139. ISBN 9780806900513.
^Daniel Larsen (2021). Plotting for Peace: American Peacemakers, British Codebreakers, and Britain at War, 1914-1917. Cambridge University Press. p. 385. ISBN 9781108486682.
^"1st parliamentary term | Casimir J. Prinz zu SAYN-WITTGENSTEIN-BERLEBURG | MEPs | European Parliament". www.europarl.europa.eu. Retrieved 2023-01-05.
^Schumacher, Martin (2006). Die Volksvertretung 1946–1972 [The People's Representation 1946-1972] (PDF) (in German). Commission for the History of Parliamentarism and Political Parties. p. 1376.
^William Grimes (3 May 2008). "Philipp von Boeselager, Who Attempted an Assassination of Hitler, Dies at 90". New York Times.
^"Nachruf: Trauer um Jahrhundert-Sängerin Hilde Zadek". Kleine Zeitung (in German). Graz. 22 February 2019. Retrieved 22 February 2019.