The Backlash Mission

<b>From the back cover of the DAW first edition:</b> "The war drug! That was what Backlash was, the secret formula which turned common ordinary soldiers into the legendary Blackcollars, the super warriors who, decades after Earth's conquest by the alien Rytril, remained humanity's one hope to regain freedom. But the Backlash drug had been used up in the war effort, and unless Allen Caine and his commando team could discover where the formula was hidden, there would be no new generation of Blackcollars to carry on the battle against the tyrannical Rygril. <p>The Blackcollars had pinpointed one spot on Earth as the possible cache for Backlash - Aegis Mountain, an impregnable fortress that even the enemy had never been able to crack. But Aegis was in the heart of Rygril-run territory, and even with the aid of the last surviving Blackcollars, could Caine evade the enemy long enough to take on the challenge of the deathtrap called Aegis Mountain?"