"Germany lost to the allies in WW1 and suffered huge territorial losses giving away its land and population to Poland, Russia, France, Belgium an Denmark and ultimately had to sign The Treaty of Versailles. Germany had to accept what happened and their military power was reduced" "Unlike the countries of Europe, the factories and home of the US had not been destroyed. Manufacturing, production and efficiency had increased through necessity during the Great War." found this online, hope it helps
In terms of "before and after, results of actions lead to consequences," here are the effects that I know of: As for America, World War I established a base of greatness and showed the rest of the world how powerful this rather young country actually was. America went through a short term of greatness and prosperity known as the "Roaring 20's," which benefited much of America and the western world. As for Germany, Germany suffered a short period of poverty due to the massive amounts of reparations that needed to be payed to the allied countries. During this time, a hatred known as Anti Semitism was strengthened in the hearts and minds of the German people, which eventually led to the founding of Hitler's Germany.
