Cobra Slave
"In times of war, the Cobras are necessary, yet in times of peace they are often reviled by those they have saved. Now the Cobras have resisted a second invasion of the alien Troft forces, and forced the Troft to a stalemate--and even converted some thoughtful Troft into uneasy allies against their kin. Yet all is not well in the human sector of the galaxy. A supposed sister empire, the Dominion of Man, threatens the Cobra worlds with what is, in effect, enslavement, as it moves to consolidate power over all the Cobra worlds."--Provided by publisher.