As a further reference point for this crucial cross-Sector area, I also purchased MGT: Alien-Aslan/ Trojan Reaches to look into these major Aliens, as well as the Imperial trade links across the upper end of the Sector towards the TL15 stellar polity of the Florian League & the Aslan clans "Behind the Claw" of the Great Rift.
When viewed this cross-roads of stars are Urnian-P/ Foreven; Five-Sisters-M/ Spinward Marches; Menorial-A/ Trojan Reaches; and Marrakesh-D/ The Beyond.
Supportive of what I am writing currently were MGT's Spinward Marches, Aliens: Darrian, and Aliens: Aslan. I am looking forward to the soon-to-be released Aliens: Zhodani.
One of these reasons is to further shed light on the annual Zhodani navy mission of 2-5 Light cruisers seen moving down through the Trojan Reaches for what they claim are diplomatic and trade missions (besides "showing the Flag" which is obvious to any observer). That and of course perhaps some insight on how the Zhodani view the Darrians (yes the smattering of data from Darrians presents the Darrain POV...like the rest of those in Traveller, looking through the Zho prism will be educational).