In the aftermath of the sinking of the British passenger liner Lusitania, the United States declared war on Germany. Germany pledged to the United States it would not repeat such an action. President Wilson prohibited Americans from traveling to Europe. Great Britain began an intensive campaign to build a submarine fleet. the United States began leasing its submarines to Great Britain.
In the aftermath of the sinking of the British passenger liner Lusitania,
the United States declared war on Germany.
Germany pledged to the United States it would not repeat such an action.
President Wilson prohibited Americans from traveling to Europe.
Great Britain began an intensive campaign to build a submarine fleet.
the United States began leasing its submarines to Great Britain.