What were president wilsons reasons for going to war ww1

Zimmerman Note, the note Germany was going to give to Mexico that promised Mexico, if they joined Germany to attack America, Mexico would regain all the land they lost to America, the note was intercepted by the English, who then took the note and gave it to us, and then America was like "Omaewa mouh shinderiu" then Germany was like "Nani???" and here we are