F-35chan
The Ancestors, scientifically designated archeohomina, and commonly referred to as ancient humanity, were a prehistoric, technologically advanced civilization of the human species that rose to preeminence in the Milky Way galaxy by approximately 150,000 BCE. Having first achieved interstellar travel over a million years earlier and colonized planets across the Orion Arm toward the galactic border, humans became a major political and military power rivaling the Forerunners; indeed, the Didact considered them the second greatest military power and the latest challenge to Forerunner influence. Over a hundred thousand years later, the Librarian would tell John-117 that they were the greatest threat ever faced by the Forerunners. Members of the most predominant human species of this era were on average larger, stronger, and significantly more intelligent than modern humans. This civilization allied with the contemporary San'Shyuum and later waged war against the Flood, only to come into conflict with the Forerunners; they ultimately suffered a disastrous defeat against the Forerunners and were subsequently regressed into hunter-gatherers, confined to their ancient homeworld.
But what if they somehow survived in another Galaxy?