Total defense duty is pretty hard core. 16-70 obligatory service in time of war.
(Per Wikipedia, Sweden's military has Reserves of 34,000. Vs. Finland's has Reserves of 870,000. Even though Finland's total population is a bit over 1/2 of Sweden's.)
I wonder what the requirements are on nonresidents who just happen to be temporarily in the country?
Same goes for Switzerland. My understanding is that Swiss citizens working abroad use vacation days to fulfill their yearly drills.