Napoleon planned his Russian campaign extensively: he had supply hubs set up all over the Duchy of Warsaw, with feeder routers from Prussia keeping them full.
What he didn't anticipate was how bad the roads in Russia would be and how long the Russian army would retreat along them. You can't resupply an army that is marching on a narrow dirt road through a forest because it's blocking its own supply lines.
alt Hacker News
Napoleon planned his Russian campaign extensively: he had supply hubs set up all over the Duchy of Warsaw, with feeder routers from Prussia keeping them full.
What he didn't anticipate was how bad the roads in Russia would be and how long the Russian army would retreat along them. You can't resupply an army that is marching on a narrow dirt road through a forest because it's blocking its own supply lines.