We don't want to keep dying for you. Having all the troops keep dying.
Congress of Vienna
We must find peace for us to survive in Europe.
We need to create a good plan for this to work.
Napoleon came into power as a new constitution that was signed led him to take over France. Napoleon was a great commander of the military. In a few years people voted to have him as the emperor of France.
Later in his reign Napoleon kept losing battles and losing land in France. After the losses kept racking up his troops turned against him and forced him to resign the throne as the troops didn't want't to be getting killed.
The congress of Vienna was made to set up a long term peace plan in Europe. A Austrian prince came up with the plan and ran the congress. But the congress composed of leaders from each country. In the long run it work for fifty years but it reduced France's borders.