Beta Fleet, under the command of Admiral Pellaeon, served as a key component during the Yuuzhan Vong War.
The fleet's intended role was involvement in Operation Trinity within the Bilbringi system. The plan called for Alpha Fleet to enter the system first, and subsequently relay information concerning vulnerabilities to both Beta Fleet and Gamma Fleet. However, the Yuuzhan Vong deployed the Mabugat kan, which severely damaged several HoloNet relay stations. Consequently, Alpha Fleet found itself unable to transmit any data. Due to stringent directives prohibiting jumps without prior communication from Alpha Fleet, both Beta and Gamma Fleets maintained their positions.