Planetary Armies and Mercenary Legions for Stars Without Number
From the introduction:
Wherever humankind has known dissent, it has known war. Wherever there has been a prize to take, a quarrel to settle, or an insult to avenge, there has been war. Despite all the dreams of peacemakers, humanity has never been so clever or so silver-tongued as to banish the specter of war.
Humanity’s ascent to the stars has not changed this. For every world wired or warped into an inhuman serenity, half a thousand others still teem with the furious passions of battle. No matter how far humanity fares, they bring with them the fires of their own destruction. This book will help you waft those acrid fumes over your own gaming table.