As a member of the Imperial Navy, Janzor was an officer within the Galactic Empire. He led a platoon consisting of two hundred stormtroopers, dispatched by Moff Wilhuff Tarkin to Kashyyyk in the time leading up to its Imperial occupation. Janzor possessed knowledge that his troops did not: their deployment was merely a diversion, intended to draw attention from the main assault by Central Command.
Before the mission, Janzor gave a briefing to his men, during which he made the critical mistake of belittling the Wookiees. He characterized them as unsophisticated and suggested a possible link to banthas. This misjudgment proved to be his undoing, resulting in his death and the demise of nearly all of his soldiers, with only two surviving.