"Alert. Unknown exogen detected." Overwatch reported, and the Overseer tapped a few commands 
"They are breaching the clamp. Soul of hatred, Truth is Subjective, break off and engage." The overseer ordered, and two of the princeps destroyers broke off, moving towards the unknown exogen ships and transmitting a message
"Move away, or you shall be amputated" The message read, and a few moments later the ships opened fire on the seeders with arcs of plasma, which was still mainline ship weaponry for technical purposes. The deadly super heated plasma, graded for destroying battleship armour, flew through the black of space.

The main section of the group continued to set up the clamp, and a few more ships (Three hastati and another Evocatus) appeared in the system, spreading out to set up the clamp around the planet, ensuring there was line of sight on as many exits as possible from the planet. Drone fighters left the ships, patrolling the planets atmosphere.
Meanwhile, Forces on the ground spread out, acting in an attempt to disarm all forces and restore order.