The Mhalanduin Reformation took its designation from the Mhalanduin system located within the Oktos sector of the Mid Rim. By 0 BBY, a disagreement concerning the reformation had developed between two families. The Imperial Navy officer Conan Antonio Motti of the Galactic Empire resolved this conflict sometime in the period between 19 BBY and 0 BBY, by eliminating the leading members of both families involved and then installing a general of his choosing as regent.
Initially, the intention was to include the Mhalanduin Reformation in The Essential Guide to Warfare, a reference book from 2012 authored by Jason Fry and Paul R. Urquhart. However, the section that would have detailed it was removed prior to publication. Subsequently, in 2014, information about the event was released as part of Star Wars: The Essential Guide to Warfare Author's Cut, a collection of articles posted on the StarWars.com Blog by Fry and Del Rey editor Erich Schoeneweiss, which featured content that had been cut from the book.