Grow your own food or you will starve till death!
Build your own bunker, hide for the soldiers and let your exile rise.
You need money to build and furnish your bunker and food, iron and wood are the only currencies. You have to trade, when you need some money, but be careful: if you're selling too much food, you might be starving to death.
Enjoy the beautiful world, that remains after the war.
Find food and other ressources in the ruins of the world.
But beware of the soldiers, they will kill you, if they can.