Communicating on a telepathic band no humanoids could perceive, much less understand, the coordinating intelligences behind the Intai Juhen invasion of the colony world Delporte pondered their situation. The initial invasion had gone well. As usual, the insertion of assault forces had gone unnoticed until it was too late, and the combat drones had smashed through the human defenses easily. Coated in thick layers of chitin and silicates, the lumbering warrior caste was nearly immune to the small metal projectiles humans used as their primary weapon. Even the human lasers did little but boil off armor plate that was easily replaced. The primary human spaceport and the city around it had been captured within a single day and night. The harvest of human females had likewise been good. While the Intai Juhen had little use for the males of the species, the females were highly prized for their delectable psychic emissions.
However, the invasion had not been without setbacks. The humans of Delporte were of Terran stock, originating from a world farther out away from the galactic core, where the Intai Juhen originated. While the rim of the galaxy was fairly infested with humanoids, it was the Terrans that the Foremost Castes prized most as prey. The species exhibited a tenacity and mental fortitude not found in most humanoids, and the difficulty of breaking them made their psychic emissions that much more alluring. But all rewards come at a cost, and on Delporte, the Intai Juhen were paying it. Human forces had been driven out of the cities and towns, into the back country. Operating in small groups, and arming themselves with slower-firing but much larger weapons originally meant to kill the now nearly extinct mega fauna, humans had managed to inflict a stinging rebuke here and there.
As the days dragged on, more and more combat drones and their associated clusters of harvester forms were destroyed. Harvesters and Seduction Caste forms were small and soft, and could be easily replaced by the Intai Juhen Womb Caste. Combat drones were large, resource intensive, and required ample supplies of the inorganic materials that made them so tough and deadly. Defeating a cluster of armed humans in wilderness was a different sort of warfare than what the combat drones were optimized for. When the inevitable off world response came, and human warships laden with proper troops, whether encased in powered armor or enhanced with implants, the combat drones would be needed.
It was then that the Pensive Lobe of the coordinating intelligences came to a solution. Human captives could be used to fight the feral humans. While females were far too valuable as prizes, indeed they were the point of attacking a human world at all, there seemed to be plenty of male humans that were only of nuisance value to the Intai Juhen. The Pensive Lobe suggested that males could be captured and molded into simple combat forms. Harvesters and the Seduction Caste forms could capture them using most of the same techniques... while male psychic emissions were often weak and unappealing to the Intai Juhen, they were no less vulnerable to being broken. Once broken, their simple anatomies could be optimized for battle and they could be sent back out to kill other humans. Perhaps they could even use human equipment, ample supplies of which lay abandoned in the streets of the captured city. Humanoid combat drones would be adequate to kill humans, and would be essentially disposable - their loss would mean nothing to the Intai Juhen, while still removing the threat from feral humans. These plans were broadcast out to the clustered sentiences of the Combat Drones and their escorts. New tactics were quickly devised, and new forms of harvesters were created. Capturing males rather than killing them where possible became the order of the day.
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The two troopers stalked quietly through the brown wheat field, their movement covered by the blowing wind. They were following a lone Combat Drone as it plodded across the abandoned farm fields. It was acting unusually, traveling across open country alone, seemingly without escorts. The thing had moved several miles, stopping here and there, examining any artificial structures then moving on. Periodically, it would vanish inside buildings or stands of trees, reemerging later. The humans were tailing it, partly in hopes of killing it, partly out of lack of orders to the contrary.