YearrooWhen did the US enter World War I?
191720th century · 1900s
The US enters World War I.
In April 1917, after German U-boats sank American ships.
1917
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Around the same time
- When was the Lusitania sunk by a German submarine?1915
- When did Einstein publish general relativity?1915
- When was the National Park Service created?1916
- When was the Russian Revolution?1917
- When was the first jazz record released?1917
- When did World War I end?1918
- When did the Spanish flu pandemic begin?1918
- When was Grand Canyon National Park created?1919
Some events played out over months or years, so we use the year they are best known for. Spotted a mistake? Email [email protected].