1. The United States entry into World War 1 in 1917 played a key role in the Allied victory. General John Pershing led American forces in Europe.
2. President Woodrow Wilson sought a postwar settlement based on his Fourteen Points plan for open diplomacy and self-determination.
3. However, at the Paris Peace Conference the other Allied leaders prioritized harsh penalties for Germany over Wilson's vision for lasting peace. The resulting Treaty of Versailles redrew maps and imposed large reparations on Germany.