Heir to a Europe of sister republics to the Directory, Napoleonic Europe reached its apex in 1810-1811. It gave rise to a mosaic of more or less complete transfers of the French model, as well as a desire for dynastic integration on the part of the Bonapartes. The downward spiral of the continental system, the lack of support of certain elites, notably Catholic ones, and the Grand Empire’s weak resilience in the face of defeats beginning in 1812 account for Napoleon’s fall in 1814. Despite his affirmations at Saint Helena, the failure was due to the imperialism of the Grande Nation as embodied by the emperor.
Source : Napoleonic Europe