Danger Level: 3
Who
Civilisation X is an unknown ancient civilisation that has created numerous anomalous objects, many of which are currently in possession of the UNAS-F. Most of these UNAs are temporally anomalous.
Not much is known about Civilisation X due to the fact that Civilisation X and the UNAS-F have not had much interaction with each other. Civilisation X is also believed to have fallen a long time ago, with their anomalous objects being the only traces of their existence left.
The UNAS-F is still working to find as many anomalous objects created by Civilisation X as possible.
When
Based on carbon dating on objects created by Civilisation X, the civilisation appears to have existed for than 5 thousand years now. However Civilisation X could have originated a lot earlier than thought.
Where
It is unknown where Civilisation X used to reside, as anomalous objects created by them have been found in all parts of the Earth.
Civilisation X does not have any current outposts, due to the fact that they do not exist at this period in time.