When did Napoleon try to invade Russia?
French invasion of Russia
Twenty train battalions provided most of the transportation, with a combined load of 8,390 tons.[39] Twelve of these battalions had a total of 3,024 heavy wagons drawn by four horses each, four had 2,424 one-horse light wagons and four had 2,400 wagons drawn by oxen.[39] Auxiliary supply convoys were formed on Napoleon's orders in early June 1812, using vehicles requisitioned in East Prussia.[41] Marshal Nicolas Oudinot's IV Corps alone took 600 carts formed into six companies.[42] The wagon trains were supposed to carry enough bread, flour and medical supplies for 300,000 men for two months.[42] Two river flotillas at Danzig and Elbing carried enough supplies for 11 days.[39] The Danzig flotilla sailed by way of canals to the Niemen river.[39] After the war began, the Elbing flotilla assisted in building up forward depots at Tapiau, Insterburg, and Gumbinnen.[39]