There have been a couple science fiction novels with this premise: Protector[0] by Larry Niven David Weber's Dahak trilogy, available as the Empire from the A

There have been a couple science fiction novels with this premise: Protector[0] by Larry Niven David Weber's Dahak trilogy, available as the Empire from the Ashes[1] omnibus [0] https://en.wikipedia.org/wiki/Protector_(novel) https://en.wikipedia.org/wiki/Protector_(novel) [1] https://en.wikipedia.org/wiki/Empire_from_the_Ashes https://en.wikipedia.org/wiki/Empire_from_the_Ashes