Confederation of the Rhine

The Confederated States of the Rhine, simply known as the Confederation of the Rhine or Rhine Confederation, was a confederation of German client states established at the behest of Napoleon some months after he defeated Austria and Russia at the Battle of Austerlitz. Its creation brought about the dissolution of the Holy Roman Empire shortly afterward. The Confederation of the Rhine lasted for 7 years, from 1806 to 1813.

The founding members of the confederation were German princes of the Holy Roman Empire. They were later joined by 19 others, altogether ruling a total of over 15 million people. This granted a significant strategic advantage to the French Empire on its eastern frontier by providing a buffer between France and the two largest German states, Prussia and Austria (which also controlled substantial non-German lands). Provided by Wikipedia