On April 2, President Wilson asked Congress to declare war against Germany specifically citing Germany’s renewed submarine policy as “a war against mankind. It is a war against all nations.” He also spoke about German spying inside the U.S. and the treachery of the Zimmermann Telegram.

What were the 3 reasons the US entered ww1?

These are 5 reasons why the United States joined World War One.

• The Lusitania. In early 1915, Germany introduced a policy of unrestricted submarine warfare in the Atlantic.
• The German invasion of Belgium.
• American loans.
• The reintroduction of unrestricted submarine warfare.
• The Zimmerman telegram.

What events caused us to enter ww1?

Germany’s resumption of submarine attacks on passenger and merchant ships in 1917 became the primary motivation behind Wilson’s decision to lead the United States into World War I.