The Division 2's second episode of DLC has a release date on PS4, Xbox One, and PC. The Last Castle includes two main missions set underneath the Pentagon, plus some exclusive assignments for Year 1 pass holders. That's coming on October 15 for pass holders and on October 22 for everyone else.
The Division 2 DLC Episode 2 Gets Release Date - GS News Update
Explore under the Pentagon on October 15.