The U.S. played a key role in World War I by initially remaining neutral but eventually entering the war on the side of the Allies in 1917. This decision was influenced by several factors, including the unrestricted submarine warfare conducted by Germany, the interception of the Zimmermann Telegram, and economic ties with the Allies. The U.S. provided significant military and financial support to the Allies, which helped turn the tide of the war in their favor and ultimately contributed to the Allied victory. Additionally, President Woodrow Wilson's vision for a post-war world based on his Fourteen Points played a significant role in shaping the peace negotiations and the creation of the Treaty of Versailles.
