You have 12 hours to search for supplies, transportation or you can continue your journey.
But as soon as night falls, you must find shelter, turn it into a fortress to stand against the hordes of monsters.
Equip soldiers, use bonuses and do not forget to follow the energy level of your fighters. 
In battle be useful to your transport, it would be nice to find a tank.
Every day the number of monsters to get more, they mutate into stronger and more dangerous forms.

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