In reading order
Marcus Takes Command
Gilbert M. Stack
The Fire Islands
Gilbert M. Stack
The Sea of Grass (Legionnaire)
Gilbert M. Stack
The Jeweled Hills
Gilbert M. Stack
Marcus Goes to War
Gilbert M. Stack
The Battle for Amatista
Gilbert M. Stack
The Centinela Gambit
Gilbert M. Stack
Morganita Burning
Gilbert M. Stack
Marcus Betrayed
Gilbert M. Stack
The Bridges of Morganita
Gilbert M. Stack
Seneca's Command
Gilbert M. Stack