First and foremost, make sure that you're deploying into the DMZ solo. This can be done by toggling off the Squad Fill option on the menu screen. You can choose any map of your preference ...

Infinity Ward has confirmed that DMZ players being unable to access Building 21 is a bug and not a new paywall locked behind purchases of Modern Warfare 2. The second DMZ map which only becomes ...

This suggests it to be the new map called as Tumen for the DMZ mode. Originally, the mode shared maps with Warzone and had others like Al Mazrah, Ashika Island, and more. Interestingly ...