Order 64 was one of the 150 contingency orders that the clone troopers of the Grand Army of the Republic were trained to carry out during different emergency scenarios. Sometime around 21 BBY, after killing the Jedi hunter Durge and disabling the Separatist General Grievous in battle, a group of clone troopers—under the command of Jedi Commander Ahsoka Tano—wondered what their next orders were going to be. As the clones and Commander Tano were walking away from the now immobilized Grievous, one of the clone troopers asked his squadmates whether they were up to either Order 64 or Order 65.