Using every relevant System Skill that they had, and listening in to the planetary communications for the next few hours revealed the extent of the situation to them.
The Tapani had dropped an entire Heavy Carrier worth of Mecha here before they left the system, and that made all the difference in the battle. With their sensors jammed, the locals had no idea that the enemy even had reinforcements on the planet, so they called for help to clear the Klem and save themselves.
Then the allied forces moved, wiping them out to the very last, and continuing radio silence until Terminus had dealt with almost all of the problem for them, knowing that the Reavers wouldn't do it for free, and likely wouldn't do it for a Tapani force at all, not a single day after the Tapani had worked with the Rebels to annihilate most of the Reaver fleet.