Which group did the United States eventually side with in World War I?

The United States eventually sided with the Allied Powers in World War I. Although the U.S. started as a neutral country when the war began in 1914, it joined the conflict on the side of the Allies in April 1917. The Allies mainly consisted of France, the United Kingdom, Russia (until 1917), and later Italy, among others. The United States' entry into the war provided a significant boost to the Allied forces in terms of manpower, economic resources, and morale.

World War I was a major global conflict that lasted from 1914 to 1918. Initially, the two main sides in the war were the Allied Powers and the Central Powers, which included Germany, Austria-Hungary, the Ottoman Empire, and Bulgaria. The war began due to a complex web of alliances, militarism, imperialism, and nationalism, with the immediate cause being the assassination of Archduke Franz Ferdinand of Austria.

The United States maintained a policy of neutrality for the first few years of the war under President Woodrow Wilson. Public opinion in the U.S. was divided, with many Americans of British and French descent supporting the Allies, and many Americans of German and Irish descent showing more sympathy for the Central Powers. However, the U.S. was economically closer to the Allies and provided them with loans and supplies while staying officially neutral.

Several factors contributed to the U.S. decision to join the war on the side of the Allies, including the unrestricted submarine warfare conducted by Germany, which led to American civilian casualties and the sinking of passenger ships like the Lusitania. Additionally, the Zimmermann Telegram, in which Germany promised Mexico the territory of Texas, New Mexico, and Arizona in return for a Mexican declaration of war against the U.S., caused a public outcry and pushed the U.S. closer to entering the war. In April 1917, citing these reasons and the need to make the world "safe for democracy," President Wilson asked Congress for a declaration of war against Germany, which was granted, bringing the U.S. into World War I on the side of the Allied Powers.