In the distant future, humans and several other races have been granted membership in the Confederation-at a price. They must act as soldier/protectors of the far more civilized races who have long since turned away from war.
Shapers of Worlds
Tanya Huff, John Scalzi, John C. Wright, L. E. Modesitt, Jr., Julie E. Czerneda, Shelley Adina, Derek Künsken, Thoraiya Dyer, Gareth L. Powell, Seanan McGuire, Fonda Lee, Christopher Ruocchio, David Brin, D. J. Butler, Dr. Charles E. Gannon, David Weber, Joe Haldeman, Edward Willett
book
Infinite Stars: Dark Frontiers
Orson Scott Card, Jack Campbell, Tanya Huff
book
Summon the Keeper
Tanya Huff
audiobook
The Truth of Valor
Tanya Huff
audiobook
Valor's Trial
Tanya Huff
audiobook
The Heart of Valor
Tanya Huff
audiobook
The Better Part of Valor
Tanya Huff
audiobook