BASFINEOS Island Information
New Home was colonized by the C-Jammer in 4512(AD) or  –9(3I), which was mostly British and Scandanavian colonistst.

Neubayern  was colonized by the Van der Lubbe in 4516(AD) or –5(3I), which was mostly German and East European colonists.

Amondiage was colonized by the Voyager in 4518(AD) or –3(3I), which was mostly French, Italian, and Spanish colonists.

For most of their history, the islands were isolated from the rest of Charted Space.  The systems within the cluster were largely isolated from each other too with rare contact, commerce, and further colonization occurring at sublight speeds.  This isolation resulted in the Islands being comprised of many small powers, each with distinct cultures and political systems.

Because they developed in isolation, language, social customs, scientific advancement, and technology in the Island Cluster developed independent from the Imperium.

Keep in mind that technology may not compatible.

A chain of events after an Imperial ship misjumped into the region led to the acquisition of Jump drive technology in the Island subsectors in 1013.   The different Islands states began expanding their spheres of influence and alliances and rivalries formed.  As a result, it is likely that at least one dispute or conflict is ongoing in the Islands at any given time, and other powers are on the verge of being drawn in or are offering assistance of one form or another.