Settlement Defense Front

"Make no mistake, we will rip you from the history books. Every last trace of you gone! You will know loss. We will be the architects of your pain, we will build monuments to your destruction. The whole world will bear witness to this, our ascension. We will blot out your skies, we will bury you in darkness. Know this and know us. We are your enemy. We are the Settlement Defense Front."

- Unidentified SetDef militant

The Settlement Defense Front (SDF), or SetDef, are a faction in Call of Duty: Infinite Warfare. They fight against the SATO.

SetDef is comprised of brutal and militant radicals. They seek to control all resources and wealth from outposts throughout the Solar System, putting a stranglehold on the countries of Earth.