The Fantastic Force was assembled after the death of Reed Richards, when the remaining members of the Fantastic Four had gone their separate ways and left a void to be filled by a new team. It was assembled by Franklin Richards, at that time aged into a teenager, using allies and associates of the FF at that time. Franklin eventually reverted back to his true age while other members came and went. The group disbanded following the apparent death of their leader and backer, the Black Panther, during Onslaught.
Other members unrelated to the X-Men include Huntara, Devlor, Vibraxas, Black Panther, the Human Torch, She-Hulk, and Lyja the Lazerfist.