My guess is either Finland or Sweden, and the war would most likely be the Winter War.
The province of Canada where I live would be excellent. We have basically the same principle of winter, plus there's lots and lots of free and open space that would be easy for an able-bodied person to traverse, but a ***** for a stumbling zombie. Also, outside of the city the population is very de-centralised, spread over a large area and there's also a plethora of large bodies of water and rivers spread throughout the land. So in short, low population, extreme ease of transportation regardless of fuel issues and lots of natural barriers to seperate/funnel the hypothetical hordes of undead
The province of Canada where I live would be excellent. We have basically the same principle of winter, plus there's lots and lots of free and open space that would be easy for an able-bodied person to traverse, but a ***** for a stumbling zombie. Also, outside of the city the population is very de-centralised, spread over a large area and there's also a plethora of large bodies of water and rivers spread throughout the land. So in short, low population, extreme ease of transportation regardless of fuel issues and lots of natural barriers to seperate/funnel the hypothetical hordes of undead