Sentinel Mk. III Kaon droids were a specific type of battle droid utilized by the security personnel of Kaon City located on the planet Kaon throughout the Galactic War. In 3639 BBY, when the Tion Hegemony rakghoul outbreak occurred on Kaon, a significant number of these Mk. III Sentinels were put into action with the goal of controlling the spread of the Rakghouls.