The strength of the 8th Army , or overall the Red Army , in the north of Lake Ladoga ( Ladoga Karelia ) , surprised the Finnish general staff .
On 30 November 1939 the Soviet Union attacked Finland in the Winter War .
The strength of the 8th Army , or overall the Red Army , in the north of Lake Ladoga ( Ladoga Karelia ) , surprised the Finland general staff .
On 30 November 1939 the Soviet Union attacked Finland in the Winter War .