What was the primary reason for Napoleon's defeat in Russia? A. Winter in Russia
B. International allies intervened on Russia's behalf
C. Guerilla tactics used by Russia's army
D. All led to Napoleon's defeat

D. All led to Napoleon's defeat

Explanation:

Several critical factors, most significantly the insufficient access to resources, unfamiliar, freezing terrain, and the strategic efforts of the French military leaders, influenced the defeat of Napoleon by the Russians in 1812.

It will be Number C that is Guerilla tactics used by Russia's army

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