Describe what happened to Napoleon when he invaded russia

Napoleon failed to conquer Russia in 1812 for several reasons: faulty logistics, poor discipline, disease, and not the least, the weather. Napoleon's method of warfare was based on rapid concentration of his forces at a key place to destroy his enemy. This boiled down to moving his men as fast as possible to the place they were needed the most. To do this Napoleon would advance his army along several avenues and converging them only when necessary. The slowest part of any army at the time was the supply trains. While a soldier could march 15 - 20 miles a day, a supply wagon was generally limited to about 10 - 12 miles a day. To avoid being slowed down by the trains, Napoleon insisted that his troops live as much as possible off the land. The success of Napoleon time after time in Central Europe against the Prussians and the Austrians proved that his method of warfare worked. However for it to work, the terrain must co-operate. There must be a good road network for his army to advance along several axes and an agricultural base capable of supporting the foraging soldiers.