Ten years after the official end of the zombie war , millions of zombies are still active , mainly on the ocean floor or on snow line islands . A democratic Cuba have become the world 's most thriving economy . Following a civil war that saw use of nuclear weapons , China have become a democracy and is now known as the " Chinese Federation " . Tibet is freed from Chinese rule and hosts Lhasa , the world 's most populated city . Following a religious revolution and the revival of Russian orthodoxy , Russia is now an expansionist theocracy known as the Holy Russian Empire . Owing to the fact that many young Russians either became zombies , was infected with HIV , or died due to drugs , the government have initiated a " breeding " program , with the remaining fertile women implied to be coercively impregnated to raise the birthrate . North Korea is completely empty , with the entire population presumed to have disappeared into underground bunkers .