Gamma Fleet can be described as a fleet within the Galactic Alliance Defense Force, commanded by Admiral Traest Kre'fey throughout the Yuuzhan Vong War. It was intended for this fleet to be a participant in Operation Trinity located at the Bilbringi system. The plan was for Alpha Fleet to enter the system first, then subsequently relay the system's vulnerabilities to both Gamma Fleet and Beta Fleet. Nevertheless, the Yuuzhan Vong deployed a number of Mabugat kan organisms, resulting in the disabling of multiple HoloNet relay stations. Consequently, Alpha Fleet found itself unable to broadcast any communications. Due to explicit instructions that prohibited jumping without receiving Alpha Fleet's transmission, Gamma and Beta Fleet maintained their locations.