russian winter

Napoleon's Grande Armée of 610,000 men invaded Russia, heading towards Moscow, in 1812. The Russian army retreated before the French and again burnt their crops and villages, denying the enemy their use. Napoleon's army was ultimately reduced to 100,000. His army suffered further, even more disastrous losses on the retreat from Moscow. According to an American military study, the main body of Napoleon's Grande Armée, initially at least 378,000 strong, "diminished by half during the first eight weeks of his invasion, before the major battle of the campaign. This decrease was partly due to garrisoning supply centres, but disease, desertions, and casualties sustained in various minor actions caused thousands of losses. At Borodino on 7 September 1812—the only major engagement fought in Russia—Napoleon could muster no more than 135,000 troops and he lost at least 30,000 of them to gain a narrow and pyrrhic victory almost 600 miles inside hostile territory. The sequels were his uncontested and self-defeating occupation of Moscow and his humiliating retreat, which began on 19 October, before the first severe frosts later that month and the first snow on 5 November."

During WWII the only cold winter was in 1941-1942,and the Wehrmacht lacked necessary supplies, such as winter uniforms, due to the many delays in the German army's movements. Hitler's plans for Operation Barbarossa also miscarried before the onset of severe winter weather: he was so confident of a quick victory that he did not prepare for even the possibility of winter warfare in Russia. Yet his eastern army suffered more than 734,000 casualties (about 23% of its average strength of 3,200,000) during the first five months of the invasion. On 27 November 1941, General Eduard Wagner,

 the Quartermaster General of the German Army, reported that

"We are at the end of our resources in both personnel and materiel. We are about to be confronted with the dangers of deep winter