The united states was drawn into world war 1 because of germany’s invasion of belgium the sinking of the and the zimmermann

The correct answer is Lusitania.

The United States was drawn into World War with because of Germany’s invasion, the sinking of the Lusitania and the Zimmerman's note.

On May 7, 1915, the German Army sank the RS Lusitania, as part of the hostilities during World War I. The sinking was part of the German attack to the British submarine because the British established a naval blockage to the navy of Germany. This action, the German invasion and the Zimmerman's note, where the Germans promised help to Mexico, were the reasons why the United State entered World War I.  

churchill warned that the soviet union had cut eastern europe off from the west with an "iron curtain."

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