Napoleon's first abdication
Napoleon's first abdication was a moment in French history when, in April 1814, the French emperor Napoleon was forced to relinquish power following his military defeat in the French campaign and his allies' invasion. == Military and political circumstances == Disagreeing with Tsar Alexander I of Russia over the future of Poland, Napoleon decided in 1812 to march against the Russian Empire.
Source: Wikipedia — Napoleon's first abdication (CC BY-SA 4.0)