The UBN was the East Coast offshoot of the California-based 'Bloods' and its members are only loosely affiliated with West Coast Bloods. It was determined by Omar 'Original Gangster Mack' Portee and his partner Leonard 'Dead Eye' McKenzie, both inmates on Rikers Island, that the Bloods hoods should unite in order to protect themselves from 'The Almighty Latin King Nation,' the largest prison gang in the New York prison system at the time.
On July 16, 1993, at the George Mochen Detention Center on the east side of Rikers Island Prison, the 'United Blood Nation' (UBN), a single Bloods entity, was created.
