Nedecca was a Human female major in the Imperial Military of the reconstituted Sith Empire during the Galactic War against the Galactic Republic. Around 3642 BBY she served under Darth Gravus in the invasion of Taris, this collaboration later continued as she accompanied him and his forces to Rabaan. By 3640 BBY she was assigned to Corellia under Sith Lord Razer. She participated in the Battle of Corellia offensives such as an assault on the Aegis Base together with Major Sanos and former Intelligence Agent Cipher Nine.