I’ve been working from “Gateway to Destiny” circa 990, primarily using the political descriptions, forward to 1105 as a framework, not canon, to create a “history” of how the current map evolved. One important thing that I observed is that the population numbers were totally re-written, especially in Crucis Margin, and rather than try to reconcile that with mass migration or mass extinction, I’ve been using my own recalculated population figures from an 1105 baseline. The UWP and population figures below are directly from the 1105 data at
https://travellermap.com, because I haven’t retconned them yet.
Between 990 and 1105
The Federate Republic consisted of 11 worlds with a population of 215 mm, highest TL 12, although the majority of the population ~ 165 mm are TL6. Somewhere in that timeframe it ceased to exist.
The Federate Republic is (was) a loose collection of worlds, and
“The Federate is strongly Solomani in terms of culture and outlook, though its links to the Solomani Confederation are tenuous at best. Within broad limits, member worlds are free to establish their own foreign policy, so relations with other polities vary from world to world.” Gateway to Destiny, QuikLink Interactive, Inc., 2004 p. 58. The Spinward worlds “are somewhat influenced by the Imperium” and Imperial naval ships call on their ports. Which implies that not all of the worlds are Imperium neutral, creating a recipe for failure during the Solomani War.
By 1105 (per the map), four of those worlds joined the
Shukikikar League, a political organization of 12 worlds with a population of ~ 811 mm. Five of the worlds with a population of ~ 401 mm are spacefaring TL > 9, the highest being TL 13 Ardi with ~ 300 mm. The four that joined the League from the defunct
Federate Republic are:
Shumi Kiri, Igkhud,
924-759 and
Blazing Sky. The first two have a TL 10 and 12 but a population of < 1mm combined. The second two are TL 5 and 6 with a population of ~ 130 mm or ~ 16% of the
Shukikikar League population (and ~60% of the old Republic.)
What happened between 990 and 1105? During the Solomani Rim War, the Imperium didn’t need another enemy on it’s border so it used T5 Resource Units to secretly entice several NOT anti Imperium planets into a new confederation. They didn’t need to be pro Imperium, just anti Solomani (enough). Several worlds along the border were / are fiercely independent and could not possibly join a pro Imperium polity, and expect to continue to holding power. Early into the hostilities, Imperium Intelligence using “neutral” brokers set up a conference at the interdicted world of
Shukikikar, to form a multi world alliance with the two fold goal of protecting the independence of the member states against Imperium encroachment, and to defend the members from the anticipated rise in piracy and Solomani commerce raiding.
Further intelligence efforts were expended to portray the Solomani as racist, expansionist opportunists, turning the tide of public opinion on the League worlds against the Solomani, convincing them that both sides would deprive them of their Independence. But at least the Imperium paid for goods and services, rather than pirating goods, like the filthy, desperate Solomani.
The business interests of the
Shukikikar League worlds have always needed Imperium markets, but years of independent political posturing required them to walk a narrow rope. The mercantile interests were brought to bear on the governments leading them to join the League in the best interests of the Independent worlds.
Also there’s a concern about the Oligarchy of Lunber.
Alternatively, everyone who wanted to stay neutral decided to form a league of worlds and the Imperium was fine with their neutrality vs. a pro Solomani thorn in their side. See Spain and Brazil during WWII. They formed the League at secret conferences orbiting the interdicted world of Shukikikar, to allay the concerns that one world might dominate the new confederation.