When the Anunnaki colonised Earth they created Star Gates to take resources to places off-world. The main one seems to have been located at the North Pole. These are of a physical construction, rather than the ethereal Portals. A warping of energies using Earth’s magnetic field. Aryans seem to have come out of this Polar Star gate.
The Aryans, also known as the Orions, are a mainly robotic alien species. Within them they have an ethereal Spirit called, a Vril. These are soulless entities that once created a Hive Mind within the Astral Plane, but are able to control robots in the Material Plane. This gives them an almost immortality. Being soulless, makes them lack awareness.
This does not mean that the Aryans cannot be negotiated with, but they are more like an Artificial Intelligence. This will always calculate ways to advance their goals. They will work temporarily with those that suit their purpose. When the Aryans arrived on Earth through this Star Gate, they immediately started terraforming the planet to suit.
The Aryans began by destroying everything they could. Not only any settlements, but even food sources. These were not required by them, but were by the Anunnaki. To bolster their numbers, the Aryans did use humans to fight for them, adapting them into killing machines. These were fed from what was killed as the Aryans moved south.
Humans were adapted with the main Aryan features. They were given augments such as exoskeletons, bearing fangs, claws and weapons. Their minds were fully under the control of the Aryans. Instructions were given in a one-way, autocratic system that gave little option of refusal. All human experiences were sent directly to the Hive Mind.
Just as the Aryans were about to win the war, they were destroyed by the Anunnaki cataclysm. Their energy sources left them vulnerable to this kind of attack. With the Aryans coming through a Star Gate, it may be presumed that they were once Anunnaki and that in some way had been assimilated by the Vril Hive Mind and into robots.