Retcon

Retroactive continuity&mdash;commonly contracted to the portmanteau word retcon&mdash;refers to deliberately changing previously established facts in a work of serial fiction. The change itself is referred to as a retcon, and the act of writing and publishing a retcon is called "retconning."

When George Lucas re-edited the original Star Wars trilogy, he made changes directly to the source material, rather than introduce new source material that contradicted the contents of previous material. However, the current series of Star Wars prequels do qualify as "new source material", and many fans have pointed out instances which apparently retcon elements of the original trilogy.

Star Wars movies

 * Possibly the first, and certainly the most well-known, Star Wars retcon occurs in Return of the Jedi&mdash;Obi-Wan Kenobi's explanation to Luke about Anakin's true fate.


 * Ever since Episode IV, the Old Republic was said to have been established c. 25,000 BBY; but when in Episode II, Palpatine said that the Republic was only 1,000 years old, the Ruusan Reformation was created to remedy this discrepancy.

Expanded Universe

 * Since Episode IV, the Republic was known to have fought the Clone Wars, and the EU added several other conflicts, such as the Great Sith War; but in Episode II, it was stated that "there hasn't been a full-scale war since the formation of the Republic." The above-mentioned Ruusan Reformation also handled this discrepancy.


 * The Imperial capital was originally referred to by writers as Imperial Center; when Timothy Zahn's name of Coruscant was introduced, the name Imperial Center was retconned to be what the Empire designated Coruscant.


 * Likewise, the capital city of Coruscant was originally called Imperial City; when Coruscant was determined to be an ecumenopolis, Imperial City was retconned to be the designation of the actual city as opposed to the planet (itself being the renamed Galactic City).


 * The name of the Republic's leader was for many years called the President of the Senate; when the prequels revealed the title to be the Supreme Chancellor, the term 'President of the Senate' was retconned to be one of the Chancellor's several official titles (some say that this was the title before the Reformation).


 * In the Jedi Prince series, Kadann and the others were trying to steal power away from Ysanne Isard. Isard is never mentioned in the series&mdash;in fact, it's frequently implied there is no Imperial leader other than Trioculus&mdash;but this retcon was created to fit the series into the established timeline.


 * It was established in the EU that Raith Sienar gave Tarkin the designs for the Death Star, and that Bevel Lemelisk developed the superlaser; after Episode II revealed that the Geonosians gave the plans to Tyranus/Sidious, it was retconned that the Geonosians developed the details based on outlines given to them by Sienar and Lemelisk. Indeed, the history of the Death Star has become so convoluted that an entire scheduled novel has been assigned to this topic alone. The novel will be, in effect, one enormous retcon.


 * The show Star Wars: Droids showed C-3PO and R2-D2 having several adventures in the time between the rise of the Empire and Episode IV; after the release of Episode III showed them to be in the employ of the same people they are with in Episode IV, it has been retconned that the two droids somehow were separated from their owners because of Corla Metonae after Episode III, then returned to them sometime before Episode IV.


 * While A-wings are not supposed to exist before the Battle of Yavin, they appear in the Droids series, which happens between the two trilogies. The identical R-22 Spearhead was then 'invented' as a predecessor of the A-wing, in order to explain the appearance of such ships in the Droids era.


 * The title Darth was supposed to be invented in the period of the New Sith Wars until the game Knights of the Old Republic introduced Darth Revan and Darth Malak, who lived 2,000 years before the beginning of the aforementioned period. It is generally assumed that the title was forgotten sometime between, so the tradition was lost. The first Sith Lord to use the title Darth in the New Sith Wars era also constantly shifted into the past: first it was thought to be Darth Bane, then Darth Rivan, and later Darth Ruin.


 * The BBY system used in many sources to represent dates in the Star Wars timeline is itself a retcon. It originated as an out-of-universe dating system and, after becoming popular, was retconned into an in-universe system used by the New Republic, et al.


 * According with their first backstory written in the Star Wars Sourcebook, the Mon Calamari and the Quarren had their first contact with offworlders when the Galactic Empire discovered their world. This generated continuity problems when Quarren appeared as background aliens in Episode I, and when the Mon Calamari Padawan Bant Eerin appeared in the Jedi Apprentice series. The idea that the Mon Calamari's conflict with the Empire was their first experience with offworlders was retconned away when they appeared as loyal members of the Galactic Republic in Star Wars: Clone Wars. Geonosis and the Outer Rim Worlds explained these previous references as Imperial propaganda.


 * Jaster Mereel was originally supposed to be the real name of Boba Fett. However, when Episode II stated that Boba was a clone of his "father" Jango Fett, Jaster Mereel was retconned into a separate character, Jango's mentor and predecessor as Mandalore. It was stated that Boba took the alias in honor of the real Jaster. It was also stated that there were many rumors concerning Boba Fett's identity due to the fact that most people in the galaxy knew very little about him.


 * Stormtroopers during the Galactic Civil War were never indicated to be clones before the prequel films. Additionally, multiple Extended Universe sources mentioned normal human stormtroopers (such as Davin Felth and Kyle Katarn) and showed the existence of Imperial acadamies (such as Carida) which trained normal humans as stormtroopers. Large numbers of clones were later retconned into the stormtrooper ranks.