This sub-category of the broader Chronicles represents a grouping of events as defined by other resources, included here for the purposes of cross-referencing. Pre-History is a general term most often defined in human science and research as that era of time dating from the earliest formation of the planet Earth, to the advent of human culture, with written and spoken language. The term itself and its primary use is in order to distinguish those events largely affixed through scientific study and research as opposed to those events documented in one form or another. It is also a very human-centric term coined at a time when there was no awareness of other historical records.
That being said, this era of time, as defined in that context, which is the early 21st Century of the Gregorian Calendar, circa 15,000,000,028.PC to be more precise, excludes a span of over 4 and a half billion years of Earth history. That span, which encompassed multiple ages, and the rise and fall of entire civilizations, was essentially 'wiped away' by powers beyond human understanding, such that all trace of it was removed from existence, and the very makeup and nature of the planet and indeed the entire region of space was regressed to an earlier time. As a result, most human science of the time projected Earth to have been formed circa 10,500,000,000.PC, near the end of this lost span, however, it was actually formed in 6,000,000,000.PC with the intervening years encompassing that lost history. See First Great Age and Second Great Age for more details.
Note: As this sub-category serves as a cross referencing tool, it will only list those events typically associated with its context in other works. Thus those events within that span of lost time will not be categorized under this heading, nor will non-terrestrial events that may have taken place concurrently, but were not known on Earth. However, all events listed are listed under their actual times of occurence, set to the Post-Creation Calendar, not the often erroneous projected times utilized elsewhere.