Six-legged Black Dragons.
There are special species found on the new planet. They have unimaginably strong body strength, stronger than a trooper in space armor. If put on old Earth, tanks would be like toys for them. Without weapons of mass destruction, Earth’s original military wouldn’t be able to do anything against them.
17 Black Dragons, the number was awe-inspiring. Even with the whole Black Star Troopers pursuing them, if the combat was done in the forest, at least 50 percent of the troopers would have to lay down their lives to kill them all, that was, if they didn’t escape into another forest first.