Respuesta :
Answer:
German U-boats stared sinking American merchant ships, of the North Atlantic.
Explanation:
April,6 1917: The National Congress declared war on Germany.
I just read a huge book about WW1 and WW2
Hitler stated that if he finds another boat that’s not German in the ocean, then he orders his men to destroy it. The US didn’t know this at the time. While the US was secretly sending supplies over to the French, a German in a boat found the US boat full of supplies and destroyed it. Then the US joined World War I.