The Greco-Bactrian Kingdom (or Graeco-Bactrian Kingdom) covered the areas of Bactria and Sogdiana, comprising today's northern Afghanistan and parts of Central Asia, the easternmost area of the Hellenistic world, from 250 to 125 BCE. The expansion of the Greco-Bactrians into northern India from 180 BCE established the Indo-Greek Kingdom, which was to last until around 10 CE. The Greco-Bactrians were known for their high level of Hellenistic sophistication, and kept regular contact with both the Mediterranean and neighbouring India. They were on friendly terms with India and exchanged ambassadors.