The source of this contradiction lies in the fact that the historians studying the events from the letters of the sovereigns and the generals, from memoirs, reports, projects, and so forth, have attributed to this last period of the war of 1812 an aim that never existed, namely that of cutting off and capturing Napoleon with his marshals and his army.
All the profound plans about cutting off and capturing Napoleon and his army were like the plan of a market gardener who, when driving out of his garden a cow that had trampled down the beds he had planted, should run to the gate and hit the cow on the head.
But besides the fact that cutting off Napoleon with his army would have been senseless, it was impossible.
The aim of cutting off Napoleon and his army never existed except in the imaginations of a dozen people.