Gage Vizzum was an Imperial officer who held the rank of Lieutenant in 8 BBY. The officer was in charge of the Subjugation of Delphidia, which was originally a mission to capture Delphidians for Imperial labor camps. However, the natives proved more resistant than he had predicted, and the attempted subjugation soon became a full-scale battle.

During the fight, Vizzum's troops captured a Kyuzo Jedi Master named Griphian Avidon, who had been in hiding from the Empire on Delphidia. Vizzum believed that Darth Vader or one of his Inquisitors would be "very interested" in meeting the Jedi.