The Kalindan Defense System comprised an interconnected, automated defense grid featuring planetary ion cannons and orbital ion mines, all managed from a central location. Operation of this system depended on a modular command circuit. Initially, the Galactic Empire oversaw the system until the Kalindans staged an uprising in the aftermath of the Battle of Endor. The technician responsible for the system deactivated it and absconded with the command module. Luckily for the New Republic, a New Republic frigate, posing as an Imperial vessel, recovered the technician, who then relinquished the module. About 6 ABY later, the New Republic orchestrated the return of the command circuit. This exchange was made in return for information on cloaking device countermeasures being researched by the Kalindan Royal Research Facility.