HomeVisitMuseum ExhibitsFact SheetsDisplay

U.S. Entry into World War I

This New York Times headline reads "Lusitania sunk by a submarine." The United States declared war on Germany on April 6, 1917. (U.S. Air Force photo)

This New York Times headline reads "Lusitania sunk by a submarine." The United States declared war on Germany on April 6, 1917. (U.S. Air Force photo)

The United States declared war on Germany on April 6, 1917. Although the reasons were varied and complex, the one having the greatest emotional impact upon the "average American" was Germany's introduction of unrestricted submarine warfare following the sinking of the Lusitania in 1915.

Click here to return to the Early Years Gallery.

Featured Links

Plan Your Visit button
E-newsletter Sign-up button
Explore Museum Exhibits button
Browse Photos button
Visit Press Room button
Become a Volunteer button
Air Force Museum Foundation button
Donate an item button