> and they almost all had to walk the ~3,000 kilometers to Moscow
Closer to 800 km than 3000. Napoleon's invasion of russia started at the neman river near lithuania. It didn't start in paris.
Now compare napoleon's "short walk" to moscow with the thousands of kilometers of logistics that alexander or genghis khan had to deal with ( and they succeeded while napoleon failed miserably ).
Another great napoleon logistic fail was his failure in egypt where he lost another army. It shows how propaganda frames the people's minds that we think that napoleon was a competent, let alone a great military leader. Objectively, Napoleon's major failures and the fact that he destroyed the french empire makes him one of the greatest military fools in human history.
http://nowscape.com/images/map_napoleon_moscow.gif
https://external-content.duckduckgo.com/iu/?u=https%3A%2F%2F...
And disease, starvation, and the general problems of the march. This is one of the things I learned from Clausewitz's discussion of Napoleon's march on Moscow, the one that produces the famous Tufte diagram.
The Grande Armeé numbered 422,000 per Tufte/Minard, 1 million per Wikipedia, the same as several large music festivals; and they almost all had to walk the ~3,000 kilometers to Moscow; and most of the food had to be locally sourced. This necessarily resulted in the force being spread out over a huge area, and every morning when it was formed up there would be slightly fewer men.
Edit: and speaking of burning boats, when they got there, the Russians had burned the food stores of Moscow, starving both the Invaders and the citizens.