How did americans affect the end of world war 1 and it's peace settlements

Americans had a huge impact on the end of World War I with the entry into the war as the Allies were at a stalemate with the Axis powers because of the usage of trench warfare.

After the war, the peace settlement that took place was one of the worst agreements.  America had the Fourteen Points which was an amazing statement of principles for peace.

Only one of those points was ever considered, and that was the creation of the League of Nations which led to the creation of the United Nations after World War II.

France and Britian wanted Germany to suffer for the war, so they denied the fourteen points and signed the treaty that led to the rise of Hitler and the second World War.

The Treaty of Versailles which blamed the whole war on Germany, as well as forcing them to make payments they could not make, taking away many freedoms, and downright punishing the country.

And as we know, when a country is not stable like this... They will choose the loss of freedoms over economic collapse and that is exactly what happened when Hitler came into play and basically saved Germany from an economic collapse while also starting the biggest world war and the Holocaust.

Yup, history can get very interesting.

Hope this helps!