The Connected

The Connected were a race of deadly,cyberorganic organisms that invaded the Jiralhanian Empire in 2580.They looked similar to the octopus like robots from The Matrix,but were technically androids.Their home planet was a giant computer that was destroyed in the Battle of Survival in 2582.The Connected were unstoppable when it came to space combat,able to tear apart ships in milliseconds.They were defeated when the Empress of the Jiralhanian Empire,Phoenixus,used deadly computer virus to destroy the enemy command ships,causin the Connected not to do anything at all because they were not getting any orders.It is unknown what happened to their species after the Battle for Survival.

Source: Halo: Rise of an Empire