- References from numerous sources establish that the various depictions of the mirror universe may not take place in concurrent timelines, meaning there could be a number of divergent alternate reality versions of this topic that do not share the same continuity. The references below this note are separated into subsections to minimize confusion regarding the divergences.
In 2374, she crossed over universes to the primary universe and kidnapped James T. Kirk, and along with Spock forced him to realize how his advice to Spock had backfired, and Kirk agreed to help the rebels. (ST - Mirror Universe Trilogy novel: Spectre)
In the 2370s, Janeway had secured a position working in the Rebellion, but was operating undercover for the Klingon-Cardassian Alliance.
By 2371, Janeway was serving as chief engineer aboard the Geronimo under Captain Chakotay. During her time aboard the Geronimo, she was also Chakotay's lover. Shortly afterwards, Janeway gained control of the Geronimo, piloted the ship to Ardana III and turned its other crewmembers, namely Chakotay, Kim, Tuvok, Kes' lover Neelix and a Cardassian defector named Seska over to B'Elanna. She cared little about the other rebels but planned to turn Seska over to Alliance Command in the hope that doing so would help to restore her former glory. However, the rebels soon escaped their captivity. Within minutes, Chakotay managed to kill Janeway but was mortally wounded in the process. Chakotay later died. (VOY - Mirror Universe novel: The Mirror-Scaled Serpent)