
On 2nd April 1917, U.S. President Woodrow Wilson asked the U.S. Congress for a declaration of war on Germany after seven merchant ships were sunk by submarines and the Zimmerman telegram was published.

On 2nd April 1917, U.S. President Woodrow Wilson asked the U.S. Congress for a declaration of war on Germany after seven merchant ships were sunk by submarines and the Zimmerman telegram was published.