Gopa (caste)
The Yadavas of the Mahabharata period were known to be the followers of Vaishnavism, of which Krishna was the leader: they were Gopas (cowherd) by profession, but at the same time they held the status of the Kshatriyas, participating in the battle of Kurukshetra. The present Ahirs/Yadavs are also followers of Vaisnavism.