don't forget the Finns had military help from Germany plus the
Russians reserved their best to fight the Germans.......
Factually incorrect. The Germans actually blocked Italian
weapons & supplies to Finland. The bulk of Finland's airforce
was actually UK-sourced gladiators. Not surprising as there
was a tentative detente resulting in the polish carve out between
Stalin and Hitler.
Voroshilov, the general in-charge of the Finland
operation was actually the People's commissar of defence. The
equivalent of head of army. The war was actually conducted by the
"quarters" which included Stalin, Shaposhnikov, Molotov and
Kutnetzov besides Voroshilov. All of whom commanded in the
latter parts of WW2. After the initial failure, Stalin sent
Timoshenko and blamed Voroshilov for the failures. Timoshenko
shouldn't need any introduction.
The Russkis used their first line heavy tank and tank bdes. As
to the reasons why they didn't succeed, reading Voroshilov's
explanation of 28 Mar 1940 is actually enlightening and
credits the Finns far more than I can do justice.
If one wants to consider how to conduct a static defence against
overwhelming odds, looking at the Finnish experience is a good read
esp with their skillful employment of camoflage, skis, SMGs,
mines/atk obstacles and mortars.
The finns actually had the military equivalent of the SS or
Italian black shirts known as the Suojeluskunta.