More like The Unifying Force

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The Saga of Seven Suns UniverseSeries
series16 books2002
Science fiction and space opera, tense and adventurous in tone, about aliens and war, set in far future and galactic scale.
Start with Hidden Empire →
JanissariesSeries
series4 books1979
About slavery, set in other star systems.
“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 →
ConquerorsSeries
series3 books1994
First contact, set in other star systems.
“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 →
VattaUniverse
universe10 books2003
Set in other star systems.
“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
Old Man's WarSeries
series16 books2005
Set in other star systems.
“Sign a document at 65, saying you intend to join up 10 years later.”
from the catalogue
Start with Old Man's War →
HonorverseUniverse
universe83 books1993
Set in other star systems.
“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, Wages of Sin, Expanded Honorverse, Manticore Ascendant, Star Kingdom (Honor Harrington), Honor Harrington Universe short fiction