war zone

noun3

1. •
   A region where war is ongoing.

   • He also thought nothing of laying down a railway in a war zone. For example, he was one of those behind the Grand Crimean Central Railway, built during the Crimean War [...]. — 2021
2. •
   A region where structures are damaged or in disarray, appearing similar to the effects of a military conflict.
3. •
   (figurative) Any area with a significant display of damage or disarray.