When the Soviet Union invaded Finland in late 1939, what transpired was a true “David and Goliath” conflict. When Finland refused a number of Soviet demands, including the ceding of substantial border territories ostensibly to enable the Soviets to protect Leningrad, the Soviets responded by launching an invasion. The invasion involved a large Soviet army, with several thousand tanks, and a large air force.But to the world's surprise the Finnish Army—many of them reservists without proper uniforms and limited ammunition—and Air Force battled overwhelming odds, and managed to resist Russian attacks for over two months, inflicting serious losses. Geography played its part as much of the Finnish-Soviet border was impassable, meaning that Soviet numerical superiority was of less import. Operating in the winter, with temperatures ranging as low as -43F, the Finns’ determined resistance won them international reputation. Although hostilities finally ended in a peace treaty that saw Finland cede 9% of its territory, Soviet losses had been heavy, and Finland retained its sovereignty.This fully illustrated text will cover the forces involved and all stages of the Winter War.