Task Force Rebel (TF Rebel) was a force of local Afghan Northern Alliance (ANA) fighters working with US Special Forces (Green Berets/US SF) in the Shahi-Khot Valley. They were, by Colonel Drucker's original plan, with mutual support from AFO teams in the area, to assault and weed out Taliban forces in the Shah-i-Kot valley prior to the deployment of the 75th Ranger Regiment. However, before reaching their target, TF Rebel was misidentified, due to no GLINT or IR strobes, and led General Flagg to believe them to be a hostile convoy and ordered the 'on station' AC-130 Reaper 3-1 to engage them. With 1 US Green Beret and 2 Afghans KIA and anther 3 Green Berets and 14 Afghans injured and left several vehicles damaged, by the friendly fire, the inexpierienced Afghans abandoned their part of the mission and retreated to Gardez, this forced the Green Berets to try to bring them back and to continue the operation, and also led to Bravo company (Bravo 6) 1/75th Rangers being deployed earlier than planned.
During the cutscene when the convoy several US Special Forces soldiers are named, Anderson and Williams are told to Get in the truck and bring them back.
The real group of Afghans with US SF advisers was called Task Force Hammer (TF Hammer) and numbered roughly 900 ANA and 40 US SF.
The 1/75th Rangers did not actually take part in this part of Operation Anaconda, instead 187th regiment of the 101st Airborne DIvision (Task Force/TF Rakkasan) would assault the valley with the 10th Mountain Division.