In 2318, while serving as a major in the Bajoran Militia, Jaro was present for the official first contact between his people and the Cardassians. This eventually led to the Occupation of Bajor, which began in earnest a decade later. (ST - Terok Nor novel: Day of the Vipers) The Militia was left in shambles during the Occupation; after the Cardassians withdrew from Bajor, Jaro led efforts to reconstitute the organization. (TLE - Terok Nor novel: Dawn of the Eagles)
In 2370, Jaro attempted to lead a coup d'état against the government of Bajor, buying weapons from Kressari merchants, who had received weapons from Cardassians in an attempt to destabilize the Bajoran government in the hopes that the United Federation of Planets would be forced to leave, which would leave the Cardassians free to reconquer the Bajoran system - including the Bajoran wormhole. The Cardassian connection to the Circle was exposed, which caused it to fail. (DS9 episodes: "The Homecoming", "The Circle", "The Siege")
Following the unsuccessful coup, Jaro was forced out of office, and was eventually imprisoned at Kran-Tobal prison. As of 2376, Jaro was still being held at Kran-Tobal. (DS9 - Worlds of Star Trek: Deep Space Nine novel: Bajor: Fragments and Omens)
- ST - Terok Nor novel: Day of the Vipers
- ST - Terok Nor novel: Dawn of the Eagles
- DS9 episode: "The Homecoming"
- DS9 episode: "The Circle"
- DS9 episode: "The Siege"
- DS9 novel: Objective: Bajor
- ST - Myriad Universes novel: Honor in the Night (Alternate timeline)