Answer:
Between 1806 and 1815, Napoleon organized the German states into the Confederation of the Rhine, but this collapsed after his defeats in 1812 to 1815. The German Confederation had roughly the same boundaries as the Empire at the time of the French Revolution (less what is now Belgium). It also kept intact most of Confederation’s reconstituted member states and their boundaries. The member states, drastically reduced to 39 from more than 300 under the Holy Roman Empire, were recognized as fully sovereign. The members pledged themselves to mutual defense, and joint maintenance of the fortresses at Mainz, the city of Luxembourg, Rastatt, Ulm, and Landau.