This lore can be found by an agent on Balmorra.
The codex is found on a console, located in the instanced agent area in the arms factory during “Destroy the Enemy” mission. It’s possible other class’s can get this codex if they are in the same group.
Category: Infiltration / Threat Elimination
Primary: Cipher Nine
Secondary: Station Chief Lekern Renald, Sanju Pyne
Operational Summary: Planet Balmorra hosted anti-Imperial terrorist cell–part of the Eagle’s network. Cell specialized in recruitment and training of terrorist assets; assets would gain experience as part of Balmorra’s resistance before being sent to support cells elsewhere in the galaxy. By infiltrating the local cell, Cipher Nine successfully neutralized the terrorist leader Gray Star (see details for method and suggested follow-up). Cost of infiltration was within acceptable range.
Cross-reference: Gray Star, Zenith, Eagle, Dominator, Lachris.