It was believed that Charum Hakkor was an artificial hubworld created by and then inhabited by the Precursors themselves, constructed using neural physical techniques millions of years before the human-Forerunner wars and likely before the Forerunner-Precursor war. The Precursors would leave behind a colossal armory, orbital arches, and star roads on the planet.
After humanity's ancient diaspora across the outer reaches of the Orion Arm around 150,000 BCE and a series of dark ages in the interim, Charum Hakkor became the capital of their interstellar empire. The planet featured a wealth of Precursor architecture and structures that further inspired ancient humanity to make it their capital. When an alliance was established between the humans and San'Shyuum, Charum Hakkor became the capital of their united empire, as it blossomed and grew at a remarkable pace. Prior to the human-Forerunner wars, the Ur-Didact and the Librarian first met at Charum Hakkor.
Several decades before the Battle of Charum Hakkor, a high-ranking human scientist, Yprin Yprikushma, discovered the Primordial on a small asteroid near the edge of the galaxy, and decided to transport the creature to Charum Hakkor. Unbeknownst to her and most in the galaxy, the creature was, or claimed to be, the last surviving Precursor.