Napoleon stationed troops near the western border of Russia. When that happened the Russian ruler, Czar Alexander I, got worried. The Russian ruler was also worried about the Continental System on his country’s need to import goods, so he began to gather his own troops. Napoleon saw the Russian troop’s movement, so he began to move his troops into Russia. In June his army of 600,000 men marched across Russia’s border. But the invasion was in trouble from the beginning. The first reason is because most of the soldiers were new recruits that had no loyalty to Napoleon. Also a lot of the army’s supplies were either spoiled or lost along the rough roads. In addition to that the heat in July made the horses miserable. The result is, many men were suffering either from diseases, hunger, and desertion, which thinned out the army’s ranks.