What caused the US to side with British during world war 1?

The U.S. sided with the Allies, particularly Britain, during World War I due to several factors, including economic ties and shared democratic values. American banks and businesses had significant financial investments in Britain and France, and the German unrestricted submarine warfare threatened American shipping. Additionally, the interception of the Zimmermann Telegram, in which Germany proposed a military alliance with Mexico against the U.S., further galvanized public and governmental support for joining the war on the side of the Allies.