Temporal Command has detected an undocumented enemy incursion into Federation space during the 23rd century. Something has changed, and not for the better. A hidden gambit has emboldened the rivals of Starfleet and given them reason to believe an invasion could actually be successful.

“Days of Doom” is a new, five-player cross-faction queue. This queue is designed for level 60 players, with normal, advanced, and elite versions.
The fate of the galaxy is in your hands. There is no room for failure.
Ryon Levitt
Staff Content Designer
Star Trek Online