Trans-humans.

The guard was walking along the west fence when he heard the noise, just a small thump.  The watch dog with him started whining, then he saw it, a figure some ways away jumping toward him.  He grabbed his binoculars and looked at the jumping figure, it was a man-grasshopper, then he saw other beast-like figures coming toward the outpost.  The guard set off the alarm, and rushed to a turret, but it was to late, a man-bat screeched and swooped down at the watchman, and made quick work of him.  The man-grasshoppers jumped over the fence, and turned it of, so a small host of other trans- humans stormed the fort, man-bats flew back and forth chasing their prey, man-beetles fought with the soldiers, but their hard shells deflected their enemies' bullets, man-spiders climbed over walls and cocooned the defenders.  Soon, the outpost belonged to the trans- humans,they took down the Alliance flag, and flew instead, the One World flag.