Republic Strategic Information Service

The Republic Strategic Information Service, most commonly known simply as the Strategic Information Service (SIS) or Republic Intelligence, was the Galactic Republic's domestic and foreign intelligence agency during the Great Galactic War and the following period of political unrest. Although the agency existed prior to the Great War's initiation in 3681 BBY, as a monitoring and decryption arm of the Senate Library, the rapid expansion of the conflict prompted the Galactic Senate to shift the group from a small-scale decryption agency to a full-fledged information and espionage bureau.

The SIS was much younger, smaller, and was stretched thinner than its intelligence counterpart in the Sith Empire, yet it served efficiently during the Great War and the subsequent Cold War. In 3643 BBY, under the direction of Marcus Trant, Agent Theron Shan undertook a mission to the Vesla system to find and gain information about the Sith Empire from Jedi Master Ngani Zho. In the process, Shan discovered the Empire's secret warship builder, the Sun Razer, designed by Dark Lord of the Sith Darth Mekhis. Shan destroyed the Sun Razer and the resulting political fallout pushed the Republic and Empire ever closer to a renewed, full out war. The agency was also called in to investigate the theft of secret plans for the Republic's superweapon, the Planet Prison. Through the investigation, the plans were recovered and the designer of the superweapon, Doctor Tarnis, was revealed to be a Sith Lord. With this, other secret Republic research such as the Power Guard Project were put at risk and the SIS and Jedi moved to secure the projects from Sith control.

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