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"Every clone has an identifying code on their wrist. Your military records will be in the database. Scan him, Artoo."
Colonel Meebur Gascon, to Gregor[1]

An identifying code also called an identifying number was used by the Grand Army of the Republic to identify and distinguish different clone troopers. It was inserted into a trooper's left wrist and could link droids, such as astromechs, to a particular trooper's military records in the GAR database.[1] During the early era of the Galactic Empire, Clone X troopers had their identifying markings removed from all databases.[2][3]

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