"Footage of a Cold War-era FDF infantry exercise in 1986 with commentary by Gwynne Dyer." Explaining Finnish neutrality.
On video they say that "Finland would be part of soviet block in wartime"
The Finns saw the situation so, that as long as it kept it's own military in shape and kept
all foreign powers away from Finnish soil, there is no need to have anything to do with soviets...
...and in kept military channels open with Sweden and Western powers in case Soviets wanted to change that. There was never any wish to be part of Soviet side on possible WWIII scenario.