New Forerunner Empire

The Resurgent Forerunner Ecumene is an early Tier 0 Civilization first encountered by the UNSC in 2561. Any signs of the Civilization were last seen in 2566 before the Great Rifts were activated, barring Slipspace Travel beyond the Frontier's Edge. Before the opening of the Great Rifts, thousands of Forerunner vessels were seen exiting Slipspace near the Tyrannus System, including massive planetary superstructures and artificial stars.

UNSC Forces have been unable to make contact with or observe resurgent Forerunner elements since the encounter in early 2561.

Reemergence
Slipspace signatures were detected on February 22nd, 2561 near the largely unpopulated Tyrannus system at the edge of human-controlled space. The small human colonies remained online for precisely 48 hours, contact was lost immediately after the arrival of Battlegroup Normandy, the Battlegroup reported no sign of the Colony at Tyrannus along with several malfunctions with their Shaw-Fujikawa Slipspace Drives.

Contact with Battlegroup Normandy was lost shortly thereafter.

Further UNSC vessels en route to Tyrannus were lost for several months, eventually re-emerging undamaged, but at seemingly random co-ordinates. ONI Prowlers sent to the area were unable to reenter normal-space.

The opening of the Great Rifts caused the disappearance of the Tyrannus system, causing a massive dark-zone in the surrounding regions of space. No UNSC or Covenant vessels sent to the Tyrannus system exited slipspace, thousands of light-years off-course.