This contains the approximate dates of major events within the Arahon multiverse. Dates are in Sentros standard, based on the formation of the Pan-Sentros Alliance (with PrF being Pre-Formation, and PoF being Post-Formation).
17 billion PrF- Oldest known universe, Takim, forms. It is speculated that pre-Starbuilder civilisations could have existed here, but there is currently no evidence of these hypothetical early-multiverse sophonts.
16 billion PrF- Xyphon universe forms.
13.5 billion PrF- Merat universe forms. Starbuilder civilisation is speculated to have reached the stars at around the same time. With no other known civilsations to impede them, the Starbuilders take over the Xyphon universe. These ideal conditions expand their rule across the known multiverse.
13 billion PrF- The Starbuilders retreat to Xyphon. In a geological blink of an eye, they vanish.
13-11 billion PrF- The multiverse enters the Silent Age, where civilisations are largely unknown. There is evidence that, during this time, massive wars were fought using leftover Starbuilder technology. This period ended eventually, either through the extinction of civilisations willing to do such a thing or through the technology ceasing to function after such a long time.
11-1 billion PrF- The Silent Age continues.
1 billion PrF- Evidence of ancient civilisations from this time puts an end to the Silent Age.
4,567 PrF- The Yolm, leaders of the oldest known Xyphon civilisation, reach spaceflight.
(work on this shall continue later)