Woodrow Wilson intended to keep America out of foreign affairs, but several factors pulled the US into World War 1. The assassination of Archduke Franz Ferdinand led to escalating tensions between European alliances. America entered the war in 1917 after German U-boats sank American ships. On the Western Front, brutal trench warfare led to massive casualties with no clear gains. The US helped turn the tide by joining the Meuse-Argonne Offensive in 1918, leading to Germany's defeat. Woodrow Wilson's 14 Points aimed to establish a lasting peace, but the resulting Treaty of Versailles was harsh on Germany, sowing seeds for future conflict.