Yes, the above answer is correct. But I believe it was Winston Churchill's Rapport with the President of America, Franklin Delano Roosevelt, that led to the USA coming to the help of Britain and her Allies. At first it was lease-lend - helping with old ships, etc, but in return in Britain allowing America to set up facilities in British held territories. But, once Japan attacked Pearl Harbour, America were able to publically declare war - and America geared up to help Britain and the Allies in defeating Germany, and Japan.
Likely Churchill.
minster Winston churchill
Winston Churchill
At the beginning of 1917 the German navy had 111 submarines. This was a large increase from 1916 when they had only 68.
In the WW1 the US declared war on Germany after the sinking of seven US merchant ships by German submarines and the publication of the Zimmerman Telegram. In the WW2 was Hitler to declare War on the USA on Dec.11,1941.
They had no weapons.
One of the most notorious instances of a German submarine sinking a passenger ship was the sinking of the RMS Lusitania on May 7, 1915. The Lusitania was a British ocean liner that was torpedoed by a German U-boat off the coast of Ireland during World War I, resulting in the deaths of over 1,100 passengers and crew. The sinking of the Lusitania contributed to the eventual entry of the United States into the war.
The U stands for Underwater. The full name in German was Unterwasser-Boot.
Likely Churchill.
By sinking them!
German submarines sank an enormous amount of British and Commonwealth shipping in the Atlantic and for a time in 1916 food stocks in Britain were down to about six weeks' supply. German submarines aslo sank some neutral ships and by sinking American ships they brought the U.S. into the war.
Unrestrictive sinkings (sinking without a warning).
They were at war with each other.
Atlantic.
World War 1.
The sinking of the Lusitania and German submarines in American waters
The Zimmerman telegram, (which the British intercepted and gave to the USA), in which Germany tried to get Mexico to declare war on the USA. Also the German submarines were sinking unarmed civilian ships sailing from neutral countries.
U-boats. (German submarines)
by avoiding sinking of US vessels by German submarines............... but, after Japan bombed Pearl Harbor, Germany declared was on the U.S.
The united states entered world war 1 because of the sinking of US ships (including the the Lusitania) by German submarines