Weapons crafted for the purpose of eliminating starships were known as anti-aircraft cannons. The experimental stealth ship of the Galactic Republic made use of these cannons, and this ship participated in the Battle of Christophsis within the larger conflict known as the Clone Wars. A specific model of anti-aircraft cannon was the J-1 proton cannons. To defend against aerial threats, the Galactic Empire deployed both the All Terrain Anti Aircraft and fixed, manually operated turrets.