The Hunas or Alchon-group were Xionite or Hephthalite tribes who, via the Khyber Pass, entered India at the end of the 5th or early 6th century and were defeated by the Indian Gupta Empire and the Indian king Yasodharman. In its farthest geographical extent in India, the Huna empire covered the region up to Malwa in central India. Although they were defeated, they were the main reason for the decline of the Gupta Empire