Black Sky Arc

The Black Sky Arc is the eighth story arc in the Orion Nero Initiative series and revolves around the Orion Nero Initiative's invasion of Alvitr.

Majority of the chapters in the arc fall under Operation Parabellum, the ONI invasion of Southeast Alvitr. With help from within, the ONI are able to spearhead through the Katona Province, taking the entire province in a single month.

Chapters

 * War Room (56) - The thorough planning of Operation Parabellum.
 * Embedded (57) - Stalker Six is sent deep behind enemy lines to neutralise the HQ element and artillery brigade overlooking the ONI invasion beachheads.
 * Hard Landing (58) - The 1st Infantry BCT and ONI Navy launch a full scaled invasion on Newcastle and Santora.
 * Vanguard (59) - ONI forces spearhead through Santora and Newcastle, capturing the wharf the enable the follow-on invasion forces to dismount.
 * Desert Runners (60) - The 1st Tank Battalion sprint across the Agoda Region to knock out two ACS Firebases near the Elphix-Katona Province.
 * Dust Storm (61) - Rhino 2-1 fights off waves of ACS forces in the middle of a dust storm after being disabled by an anti-tank mine.
 * Challengers (62) - ONI forces attempt to seize Ramstein Air Base before moving into Enderossi.
 * Shell Shock (63) - ONI forces push through the air base and fight off the retreating ACS forces back into the fields.
 * Rampage (64) - 1st IBCT elements power through the streets of Enderossi in hopes of reaching the ACS Garrison.
 * Encirclement (65) - The ACS Garrison is attacked by Blackjack Company soldiers and the traitor who helped leak information to the ONI is revealed to the other ACS high-ranking officers.