After the defeat in Russia, in which most of his 200,000 German conscripts died, Napoleon was weak enough to encourage Prussia to again declare war on France
King Frederick William III appealed to all Germans, not just Prussians, calling on his '[my] people' to fight for the fatherland against the foreign invader
Battle of Leipzig
Prussia's army, largely funded by public 'Gold for Iron' donations & including 120,000 Lutzow Free Corps volunteers wearing black, red & gold armbands, drove Napoleon from central Europe
Although sometimes described as the first collective action of the German nation, Germans did not fight at Leipzig alone; Russia & Austria were present at the battle & Saxony fought on Napoleon's side