Afghanistan: Kushan worshipper and the deity Pharro, Bactria, 3rd Century CE. The Kushan Empire was originally formed in the early 1st century CE under Prince Kujula Kadphises in the territories of ancient Bactria on either side of the Oxus River in what is now northern Afghanistan, southern Tajikistan and Uzbekistan. The Kushan kings were a branch of the Yuezhi confederation (possibly intermarried with local families) and they had diplomatic contacts with Rome, Persia and Han China. The empire declined from the 3rd century and fell to the Sassanid and Gupta empires.