galaxy, and in broad this was true enough, but the precise usage of the term was sometimes more complex. fs4f
The major Rimward hyperlanes radiated outwards around little more than half the galactic disk, and the Core Worlds occupied a C-shaped region of space around the Deep Core, the heart of the astrophysical core, which was considered as a separate outlier area, facing in the opposite direction, and extending outwards towards the Unknown Regions.
25,053 BBY, Duros, reverse-engineering the Force-based technologies of the Rakata, invented the hyperdrive.
The Republic therefore was born in the Core Worlds and spread out over the galaxy. Due to its strategic location and heavy infrastructure, Coruscant was the capital of the Republic; thus bearing the coordinates 0-0-0 on hyperspace maps.
Later, the Perlemian Trade Route was mapped, linking The Core Worlds‘ portion of the Slice was known as the Arrowhead, and soon the Republic expanded into the Colonies.
In 24,000 BBY, war broke out between the Republic and the Union; spreading both sides of the Perlemian. Hutt Empire.
During the Great Manifest Period (20,000 BBY–17,000 BBY), the Republic expanded eastwards across the galaxy into the Inner Rim and Expansion Region. Despite this, the Slice would remain the heart of navigable space. Eventually, the Republic expanded past the galactic-northern and -southern borders of the Slice, though most of the galaxy was still unknown, except for outposts such as Coruscant still remained unexplored since analogues to the Perlemian Trade Route and the Corellian Run in that direction still had not been discovered. Worse, progress was limited to dangerous one- or two-light-year jumps into a stretch of hyperspatial anomalies.
During this period, several key Core Worlds including Coruscant won every conflict it fought. In 15,500 BBY, after a disastrous first , Coruscant was assaulted by Star Dragons in the Duinuogwuin Conflict. The conflict was peacefully resolved by Supreme Chancellor Fillorean and the Star Dragon philosopher Borz’Mat’oh, who together founded the University of Coruscant.
At some point before 33 BBY but probably well after 1,006 BBY, several Human inhabitants of the Core Worlds decided that the urban sprawl of their region, the stress of urban society and the lack of peaceful coexistence with others was not for them. They decided to settle Leritor, an unimportant world in the Mid Rim near the Corellian Run.
In 12,000 BBY, the Core Worlds came under the influence of the theocratic and humanocentric Pius Dea sect which posited one of their own Contispex as the Supreme Chancellor of the Republic. Over the following centuries, his descendants sanctioned several crusades against some rival alien sects in the Outer Rim which fought back; leaving the galaxy in a never-ending state of alternating hot and cold wars. Though Pius Dea rule came to an end in 11,000 BBY, the repercussions of these crusades would sour relations between the Core and the Outer Rim over the millennia.
