What were some reasons why the U.S. entered World War 1?

The U.S. entered World War I for several key reasons, including the unrestricted submarine warfare by Germany, which threatened American lives and commerce. The sinking of ships like the Lusitania galvanized public opinion against Germany. Additionally, the interception of the Zimmermann Telegram, in which Germany proposed a military alliance with Mexico against the U.S., further inflamed tensions. These factors, combined with a desire to protect democracy and maintain global stability, ultimately led to America's entry into the war in April 1917.