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The Russian winter has been cited as a factor which significantly contributed to military failures of several invasions of Russia. Common nicknames to this concept are General Frost, General Winter and General Snow. Another similar factor is "General Mud" (see "rasputitsa"). Significance of these factors has been criticized.
The average and minimum temperatures differ among Russian regions. Winter is most severe in hinterland Yakutia (where no major armed conflicts have occurred to date), with the lowest temperature about −65°C (-85°F). In European Russia (west of the Ural mountains), where most battles were fought, the average winter temperature is rarely below −20°C (-4°F), but varies greatly: for example, temperatures in the winter of 2005/2006 fell to −20°C (-4°F) or −30°C (-22°F) in Moscow. In Russia this phenomenon is known as "Epiphany frosts" (крещенские морозы, Russian pronunciation: [krʲeˈɕɕenskʲije moˈrozɨ] - referred to Orthodox Epiphany on January 19), known for centuries for its low temperatures. But most recent winters in central Russia have been unusually warm. A New Year's Day without snow in Moscow and temperatures up to 10°C (50°F) in the middle of winter are no longer rare.
One factor in Russia's temperature is its Continental climate. The other is the geography of Russia: it is as far north as Canada, but has little open inland water to store the sun's energy. For example, in the Altai region in August, the temperature is above 20°C (68°F) during the day, but at night can fall as low as −5°C (23°F).
Effects on warfare 
Since it follows the autumn rasputitsa (nearly as troublesome), the severity of Russian winter is often linked to Russian military victories. In the Great Northern War, Charles XII of Sweden invaded the Russia of Peter the Great in 1707. The Russians retreated, adopting a scorched-earth policy. This winter was the most brutal of the 18th century, so severe that the salt water port of Venice froze. Charles' 35,000 troops were crippled, and by spring only 19,000 were left. The Battle of Poltava in 1709 sealed the end of the Swedish Empire.
Napoleon's Grande Armée of 610,000 men invaded Russia, heading towards Moscow, in the beginning of summer on 23 June 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 started in October.
The French blamed the weather for their defeat, and as early as in 1835 Denis Davydov published a military-historical article, titled "Was it Frost Who Devastated the French Army in 1812?", where he demonstrated that the French suffered decisive defeats during relatively mild weather and listed actual reasons. He used not only his own observations arguments, but foreign opinions as well, including French authors.
According to a more recent 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 World War II, 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."
See also 
|Wikinews has related news: Moscow experiences the snowiest winter in 100 years|
|Wikimedia Commons has media related to: Winter in Russia|
- Arctic warfare
- Climate of Russia
- Rasputitsa, the semiannual mud season in much of Eastern Europe
- Winter War
- ^ Chew, Allen F. (1981), "Fighting the Russians in Winter: Three Case Studies" Combat Studies Institute, U.S. Army Command and General Staff College, Fort Leavenworth, Kansas. "CSI". Retrieved 2013-01-20.
- ^ (Russian) Weather Archive "InfoSPACE". Retrieved 2009-05-20.