The city of Kars was one of the 5 main cities of country F, due to all the chaos and destruction that the mutant beasts brought around the world, many small countries were completely wiped off the map while the remaining countries expanded their borders by devouring the missing countries.
But this expansion was merely symbolic, the reality was that the vast majority of countries had been severely damaged by the chaos of that year and were forced to concentrate their population in those cities that managed to remain standing during that period of time.
Walls were built and governments around the world spent most of their time trying to rebuild what they could and strengthen their defenses as much as possible, in the case of country F, it kept some cities and towns that were rebuilt little by little. .