# Kanishka was succeeded by his son Vasishka. # Vasishka was followed by Huvishka and Kanishka II (son of Vasishka). # Kanishka II was followed by Vasudeva I. # Vasudeva I was the last great king of the Kushanas. After his death, the empire disintegrated away. He probably died in 232 AD After the death of Emperor Vasudeva I in 225, the Kushan Empire split into western and eastern halves. The western Kushans in Afghanistan were soon conquered by the Persian Sassanid Empire. In 248 CE, they were defeated again by Persians, who deposed the western dynasty and replaced them with Persian vassals— cities or kingdoms that forfeited foreign policy independence, in exchange for full autonomy and, in some cases, formal tribute—known as the Indo-Sassanids, or Kushanshas. The eastern Kushan kingdom was based in the Punjab. Around 270 CE, their territories on the Gangetic Plain became independent under local dynasties, such as the Yaudheyas. In the mid-4th century they were subjugated by the Gupta Empire under its leader, Samudragupta. The last of the Kushan and Sassanian kingdoms were eventually overwhelmed by the Hepthalites, another Indo-European people from the north.