<Li> 1804: Francis I of Austria declared the new Austrian Empire as a reaction to Napoleon Bonaparte's proclamation of the First French Empire in 1804 . </Li> <Li> 1806: As a result of the War of the Third Coalition, Napoleon I annexed some territories East of the Rhine, replaced the Holy Roman Empire by the Confederation of the Rhine as a French client - state . </Li> <Li> 1807: Prussia lost one half of its territory following the War of the Fourth Coalition . </Li> <Li> 1815: After the defeat of Napoleon, the Congress of Vienna reinstated the Germanic states into the German Confederation under the leadership of the Austrian Empire . </Li>

List four problems faced by germany when it was unified in 1990