This was an expedition escalation received from Heirarchy.

No acceleration gate. Warp to location bring you right to room with enemies. I was able to warp in cloaked and get to position.

• Battleship x5
• Battlecruiser x3

Then

• lots of frigs/cruisers/destroyers after I decloaked

Then after killing some stuff

• Elite cruisers x7

Killing the Sentient battleship triggered the next step in the expedition.