More like After the Coup

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JanissariesSeries
series4 books1979
About slavery.
“Janissaries are an American series of military and political-based science fiction novels are set in an interstellar confederation of races, in which humans are a slave race entrusted with military affairs and law enforcement.”
from the catalogue
Start with Janissaries →
VattaUniverse
universe10 books2003
Space opera, set in space.
“Get kicked out of the Academy and the family still hands you a ship.”
from the catalogue
Start with Trading in Danger →
includes Vatta's War, Vatta's Peace
HonorverseUniverse
universe83 books1993
Space opera, set in space.
“At the center stands one officer, Honor Harrington — captain, then something far larger — and the six-limbed empathic treecat who rides her shoulder.”
from the catalogue
Start with On Basilisk Station →
includes Honor Harrington, Saganami Island, Worlds of Honor anthologies, Expanded Honorverse, Wages of Sin, Honor Harrington Universe short fiction, Manticore Ascendant, Star Kingdom (Honor Harrington)
Old Man's WarSeries
series16 books2005
Space opera, set in space.
“Sign a document at 65, saying you intend to join up 10 years later.”
from the catalogue
Start with Old Man's War →
ConquerorsSeries
series3 books1994
First contact, about aliens, set in space.
“Zahn alternates perspective between the human and alien chains of command, using the shifting viewpoints to slowly unpick why the conflict started in the first place.”
from the catalogue
Start with Conquerors' Pride →
Empire of ManSeries
series4 books2001
Space opera, about survival.
Start with March Upcountry →