Kushan Empire

The Kushan Empire (Sanskrit: कुषाण राजवंश, Kuṣāṇ Rājavaṃśa; BHS: Guṣāṇa-vaṃśa; Parthian: Kušanxšaθr) originally formed in the early 1st century AD under Kujula Kadphises in the territories of ancient Bactria around the Oxus River (Amu Darya), and later based near Kabul, Afghanistan. "The Kushan Empire spread from the Kabul River Valley to defeat other Central Asian tribes that had previously conquered parts of the northern central Iranian Plateau once ruled by the Parthians."

During the 1st and early 2nd centuries AD, the Kushans expanded across the northern parts of the Indian subcontinent at least as far as Saketa and Sarnath near Varanasi (Benares), where inscriptions have been found dating to the era of the Kushan emperor Kanishka, which began about 127 AD. Around 152 AD, Kanishka sent his armies north of the Karakoram mountains. They captured territories as far as Kashgar, Khotan and Yarkant, in the Tarim Basin of modern-day Xinjiang, China. A direct road from Gandhara to China was opened which remained under Kushan control for more than 100 years. The security offered by the Kushans encouraged travel across the Khunjerab Pass and facilitated the spread of Mahayana Buddhism to China.

The Kushan were a branch of the Yuezhi confederation. Previously a nomadic people residing in eastern Central Asia, the Yuezhi moved southwest and settled in ancient Bactria. They had diplomatic contacts with the Roman Empire, Sassanid Persia and Han China. While much philosophy, art, and science was created within its borders, the only textual record we have of the empire's history today comes from inscriptions and accounts in other languages, particularly Chinese. The Kushan control fragmented into semi-independent kingdoms in the 3rd century AD, which fell to the Sassanians who targeted from the west. In the fourth century, the Guptas, an Indian dynasty also pressed from the east. The last of the Kushan and Sassanian kingdoms were eventually overwhelmed by the Hepthalites, another Indo-European people from the north.