6th coalition

In 1812, Napoleon stood as the almost uncontested master of Europe. His former German enemies, Austria and Prussia, stood humiliated and all but vassalized by the French eagles, while Russia now stood in an alliance with Napoleon. There was still the bleeding ulcer of the Iberian peninsula, but...

As the title says. What if Napoléon had managed to force an engagement at Smolensk with the Russians and comprehensively defeated prince Bagration's troops ? How probable would it be for Napoleon to be able force a peace on Russia, maybe pushing back the Russian western frontier to where it was...