Alien Barracks

The silhouettes discernible from orbit are indeed buildings, and closer inspection reveal them to be of an obvious martial nature. While abandoned for some time - though very recently on a galactic timescale - Science Officer … believes that secrets of alien tactics may yet be exhumed from beneath the dust that covers the decaying barracks and looted armories. A Special Project may be issued to study the remains.

The command below will trigger the "Alien Barracks" event in Stellaris:

When this event fires, you can choose between these 2 options:

• Acknowledged.
  • Start special project: Alien Barracks
• That this outpost is dead and buried speaks volumes.
  • Influence: +None to None

Stellaris events fire in chains — one event leads to the next. Here is how Alien Barracks (anomaly.3015) connects.