The Keep Earth Human League (K.E.H.L.) was a 23rd century movement that strove to abolish any and all extraterrestrial presence and influence on planet Earth. It was first formed after Zefram Cochrane's first warp flight, which led to first contact with Vulcans. The K.E.H.L. gained notoriety after the events of the Khitomer Conference in 2293. (TOS novel: Sarek)
It is unknown if K.E.H.L is related to Terra Prime.