Hephthalite Empire
The Hephthalite Empire was another Central Asian nomadic group to invade. They are also linked to the Yuezhi who had founded the Kushan Empire. From their capital in Bamyan (present-day Afghanistan) they extended their rule across the Indus and North India, thereby causing the collapse of the Gupta Empire. They were eventually defeated by the Sasanian Empire allied with Turkic peoples.