When Taetrus fell, the turians knew little about the Reapers except that they wanted to enrage the turians. Staying calm, the turians massed in force around Palaven, their homeworld. Fleet Admital Irix Coronati, in what became known as the "Fifteen-Minute Plan," stationed only two carriers, Undaunted and Resolute, near the system's relay. When the Reaper fleet emerged, the carrier launched swarms of unmanned fighters and spy drones. These were quickly destroyed, but the drones transmitted vital data on the Reapers' effective range, fleet composition, and exact location. The turians other ships then deployed to defend the system in earnest.
Knowing that the Reapers' weapons had a longer effective range than any of his own, Coronati made a short, daring FTL jump--landing his dreadnoughts in the middle of the Reaper fleet. The dreadnoughts then turned to line up their main guns on the Reapers, which also needed to turn to fire on the turians. This ploy used the Reapers' size against them--because they could turn faster, the turian dreadnoughts locked targets first, and their concentrated firepower downed several Reaper capital ships.
The Reapers countered instantly. Their destroyers performed a jump of their own to the skies above Palaven, beginning orbital strikes on turian cities. The turians, forced to defend the planet, found themselves in a pitched battle far from the relay, from which emerged a seemingly endless line of Reaper ships. After massive casualties, Coronati ordered retreat.
The turians insist that Palaven is not lost--the battle mas merely moved to the ground. Reaper troop transports have dumped hordes of husks to capture Palaven's inhabitants, but met with little success. Reaper capital ships are destroying city after city. But much of the turian fleet is still operable, and the citizenry is heavily armed. The turians refuse to be intimidated.