Which gang is known to have a rivalry with the Bloods?

The Crips are known for their longstanding rivalry with the Bloods. This conflict originates from their formation in Los Angeles during the late 1960s and early 1970s, where both gangs developed their identities and territories. The rivalry is characterized by violent encounters and a range of criminal activities as each gang competes for control and influence in various neighborhoods. Understanding this rivalry is important, as it helps law enforcement identify gang-related activities and the dynamics that can contribute to violence in the communities affected by these gangs.

The other choices represent different gangs that do not have the same direct historical rivalry with the Bloods. MS-13 is primarily known for its conflict with other Latino gangs and does not traditionally conflict with the Bloods. The Nortenos are primarily a Latino gang in Northern California and also do not generally engage with the Bloods in the same way as the Crips do. The Iron Horsemen are primarily an outlaw motorcycle club and have different affiliations that do not center around the Bloods and Crips rivalry.