In Today's episode we'll be visiting a number of different locations.
First, Iberia — because Napoleon's other war, the one being fought in Spain and Portugal, was quietly draining exactly the men, materiel and focus that would be ideally required in the east.
Then we’ll head east ourselves, to the Ottoman front and take a short detour into the Caucasus.
Next it’s back to St Petersburg, to watch Speransky's reform programme start to come apart at the seams.
And then finally, the main event — the actual mechanics of how France and Russia went from suspicious allies to open enemies over the course of 1811, and what both sides were doing about it.