Coming home to a different city

I stood at the gate and hesitated before I slowly walked through. High walls surround the city now, with barbwire attached to the top. The sky is dark. The sun has vanished. There has been a terrible attack by the UN , I heard. The whole city was destroyed but they rebuilt it. As I walked in I saw high dark buildings. They almost reach the black skies. Here it is, the new Dark Den.