The revelation inflamed American public opinion and materially increased support in Congress and the country for eventual U.S. entry into World War I.
References / Sources
No source references have been added for this event yet.
Related Timeline Entries
September 17, 2026
•
Donald Trump
Foreign Policy
Trump Threatens Tariffs on Europe Over Canada-EU Membership Proposal
President Trump threatened to impose serious tariffs on Europe if Canada is allowed to join the EU as an associate member.
September 17, 2026
•
Donald Trump
Foreign Policy
Trump Threatens to Impose Serious Tariffs on Europe Over Canada-EU Membership Proposal
Trump threatened to impose tariffs on Europe if Canada joins the EU as an associate member.
September 17, 2026
•
Donald Trump
Foreign Policy
Trump to Hold Iran Talks with Gulf Leaders Next Week
Trump is set to engage in talks with Gulf leaders regarding Iran.
September 16, 2026
•
Donald Trump
Foreign Policy
Trump Administration Imposes New Sanctions on South Africa
The Trump administration announced new sanctions against South Africa over alleged discrimination against white citizens.