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|The [[Dark Age of Technology]] begins. [[Human]]ity begins to colonise the nearby [[System|star systems]] using conventional sub-light spacecraft. The new colonies must rely on local resources, and be completely self-sufficient in all vital areas in order to survive. Ten generations are needed to travel between the more distant of the new colonies and [[Terra]]. This state of affairs continues until [[M18]].{{Fn|[[Warhammer 40,000 6th Edition Rulebook]], pg. 1671}}

|ca. M15{{Fn|2}}|The [[kinebrach]] empire flourishes at this time.{{Fn|[[Horus Rising (Novel)]], Part Three, Chapter One2}}

|ca. M15{{Fn|3}}|The [[Emperor]] arrives on [[Molech]] and finds a portal into the [[Warp]]. He makes contact with the [[Chaos Gods]] and makes a deal for knowledge of [[warpcraft]] that will enable him to create the [[Primarch]]s. He leaves [[Alivia Sureka]] behind to guard the portal until he returns at a later date. {{Fn|3}} <!-- According to Horus, who may not know the truth -->|[[Vengeful Spirit (Novel)]], Chapter 16

|ca. M15-M20{{Fn|4}}|The [[Eldar Empire]] is at its height. The lesser races provide a negligible threat to its dominance of the [[galaxy]].{{Fn|[[Codex: Eldar (6th Edition)]], pg. 204}}