Pax Rulin/Egyrn

[Piper]

Does anyone know of any canon sources for information on the Pax Rulin and Egyrn subsectors other than "Leviathan" and the information on the Traveller wikia?

http://traveller.wikia.com/wiki/Pax_Rulin_Subsector

I'm specifically interested in the time frame of the Fourth Frontier War.

Thanks in advance.