The Ridgebacks were formed in the 21st century by theUnited Nations following the Ulysses Disaster, with the aim of having elite pilots put a quick end to terrorist threats around the world.^[2] The unit, led by a man named Slash, pilots a special variant of the ASF-X Shinden II as its primary aircraft. They became known through mercenary networks such as Arrows Air Defense and Security.^[3]


In May of 2019, the Ridgebacks were tasked to work with the Bone Arrow Squadron to rescue the Greymenfrom a terrorist cell in Iyuli^[3], and later fought with them during Operation Crusher to destroy Stonehenge Type-3 in Turkey.^[4] They later assisted Bone Arrow in ending the threat to Tokyo during Operation Override.^[5]