Well humans nuked and bio weaponed themselves a few survive but in underground shelters animals have mutated into humanoid versions of themselves most have learned at least English but due to limited tech stuff these animal nations are restricted to what they understand basically light tanks and vehicles and personal weapons but are slowly learning more,from what limited stuff they find and if the humans that survived are not killed or otherwise slaved they might help.

Map lol

Pink-panther alliance
Light blue-puma union
Orange- wolf alliance
Light green - german Shepard Regime
Red - Siberian husky union

For more info check out https://plus.google.com/communities/100353930469409669794
And go to backstory/nations