A platoon of battle droids of the third-generation design Dark Trooper variety functioned as a garrison on Moff Gideon's light cruiser circa 9 ABY. A quartet of Dark Troopers coming from the aforementioned platoon successfully kidnapped the Force-sensitive Mandalorian foundling Grogu located on the planet Tython. Following the child's delivery to Gideon, the whole platoon received the duty of repelling the bounty hunter Din Djarin from Mandalore and his team as they attempted to seize the vessel and rescue Grogu.
While en route to rescue Grogu, Djarin kept the majority of the platoon from deploying by sealing the cargo hold in which they were kept. However, he was forced to engage one in close quarters combat, eventually destroying it with his beskar spear following a difficult fight. After defeating the droid, Djarin used the ship's airlock to jettison the remaining droids. After airlocking the platoon, Djarin reunited with his allies, bringing Grogu and a captured Gideon with him. However, the remaining Dark Troopers soon returned to the ship and began to advance on the ship's bridge, where two troopers began to punch down the blast doors. The entire platoon was destroyed by Luke Skywalker, who had just boarded the cruiser, just before they could destroy the doors.