Answer:
The United States tried to remain neutral in the First World War, but provided much more commercial and financial support to Britain and the Allies, which controlled the Atlantic routes. Germany worked to undermine US interests in Mexico. In 1917, the German offer of a military alliance against the United States in the Zimmermann Telegram contributed to the American decision of war. The attacks of German submarines on British shipping, especially the sinking of the Lusitania ocean liner without allowing civilian passengers to reach the lifeboats, outraged by American opinion. Germany accepted US demands to stop such attacks but reversed its position in early 1917 to win the war quickly. Berlin mistakenly thought that the US Army and Navy They were so weak that they would not play a decisive role.
