Do you mean when and how the alliances like Neighborhood Crips and Gangster Crip originated? I’m no Crip/Blood historian but my understanding is that the first big original split within Crips was in the late 70’s/early 80’s when rollin 60’s NHC became rivals with 83 GC with most surrounding Crip gangs choosing a side in the conflict. Bloods, not so sure but I think it has to do with a lot of their hoods predating the official Blood alliance like the Brims and the Piru’s being around before the actual Blood alliance which was actually a response to the Crip county wide expansion.