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The New Desides were a group of EFSF officers that were stationed at Pezun that staged a rebellion that overthrew the Federation leadership at the asteroid. Their name is a portamanteau of "decision" and "dissident". The New Desides swore to uphold the ideas and principles of the Titans of whom they modeled themselves after and they are composed of remnants of. The story of the New Desides is serialized in Gundam Sentinel, which takes place in the closing stages of the events of Mobile Suit Zeta Gundam until its conclusion in Mobile Suit Gundam ZZ.
On January 29, U.C. 088, A group of junior officers in the Titans Mobile Suit Instructor Corps stationed at the remote asteroid Pezun near Side 2(L4) stage a rebellion against the AEUG allied command of the facility in order to further their own ambitions. In response to this action, the Earth Federation government forms Task Force Alpha, a small force of EFSF, AEUG, and Karaba veterans in order to deal with this issue. In order to assist the task force, the Federation assigned the MSA-0011 S Gundam to the task force to complete the operation before the rebellion begins to spread to other locations. This leads to the events of Gundam Sentinel.