Thunder consisted of two Lambda-class T-4a shuttles of the Rebel variety, and it participated in the initial stage of Operation Grain Snatch alongside shuttle teams Typhoon and Lightning. Its mission was to seize the Y-wings protecting Overlord Ghorin's CR90 corvette, the [Halifax], which was transporting grain intended for the Empire. Keyan Farlander rendered all of the Y-wings inoperable, and the shuttles then secured them to be used to ruin Ghorin's reputation.