The Avenger is an unmanned combat air vehicle making its first appearance in Call of Duty: Black Ops II. The United States of America used this unmanned combat drones for their military before Raul Menendez hacked into the U.S. satellite network and used them against the U.S. and China. Avengers can be seen in "Odysseus", flying over the player when they reach the surface of the U.S.S. Barack Obama after confronting Javier Salazar. Also, in "Cordis Die", many Avengers can be seen taking out helicopters, ground vehicles and buildings. Most are seen with heavy machine guns firing at ground troops. Menendez also use these to attack the capital city of China in order to frame the United States so the SDC will not assist them to stop him.
The Avenger drones shoot at the player in Cordis Die and can be taken out by firearms or SAM turret fire (but lock-on launchers can't fire on them for some reason)