 King Parbatak assisted King Chandra Gupta Maurya in driving the Greek Satraps Seleucus (military governor) away from Punjab and Sindh.For King Parbatak's assistance to Chandra Gupta, he gave lands in northern Bihar to King Parbatak and many Kiranti people migrated to northern Bihar during that period.They became known as Madhesia Kirant people, or Limbus of Kashi Gotra.