Gopa (caste)
Narayani Sena (Gopayan) or Yadav(Ahir) Sena, the army of Lord Krishna of Dwarka Kingdom is called as the supreme sena of all time. It is described in the Mahabharat as being all of the Abhira caste. They were the basic threat to the rival kingdoms. Fearing Narayani Sena, many kings do not tried fighting against Dwarka. Because Dwarka sorted most of the threats through Krishna's politics and talent of Yadavas. Using Narayani Sena, the Yadavas extended their empire to most of India.