The turian and krogan counterattack on Palaven combined deception, courage, and tenacity. First, the turians leaked a false battle plan that drew on the same tactics they used at beginning of the assault on Palaven. Then the dreadnought Indomitable faked a problem with its drive core, coming out of FTL near Palaven's moon, Menae. Three other dreadnoughts and their attendant fleets deployed to assist Indomitable, a tempting target that drew the Reaper capital ships away from Palaven. Turian troop transports then entered Palaven's atmosphere to release shuttles, gliders, and individual soldier capsules.
The Reapers did not understand the seriousness of the threat at first--those that detected the landing crafts sent husks and Collector swarms to intercept them, but little more. This allowed krogan commandos to link up with Palaven's resistance and hand off their payloads--warp bombs and fission weapons.
In simultaneous strikes across the globe, Reaper ships began to explode. Turian resistance members had managed to smuggle the bombs inside when the Reaper processing ships, troop transports, and even destroyers and capital ships had opened their structures to indoctrinated turian leaders.
Large swaths of territory fell back into turian and krogan control. News of the victory gave a much-needed boost to the morale of the turian resistance and the galactic public.
But the action was not without sacrifice. Turian insurgents gave their lives to ensure the explosives detonated, and the processing centers they destroyed were full of civilians who died just as surely as if they had been harvested. Of the dead, General Minin Resvirix said, "Whatever they were in life, their deaths had no equal. They are worthy of joining the spirit of Palaven itself."