AATIS

The AATIS guns are Earth's orbital defense system, appearing in Call of Duty: Infinite Warfare

Black Sky
During Black Sky, the AATIS guns at Geneva were hacked by Senior Operative Akeel Min Riah and decimated the UNSA's fleet. Control of the guns were eventually regained when a SCAR Team secured the site and arrested Riah.

Operation Black Flag
Part of the battle plan for Operation Black Flag involved using the AATIS guns in Geneva against the SDF fleet. However, Akeel Min Riah managed to escape UNSA custody and sabotage the operation by destroying the ATTIS guns with remote explosives.