Fig. 5.—Diodotos.

Fig. 6.—Antiochos the Great.

The successors of Seleukos were unable to retain hold of their remote eastern dependencies. About the middle of the third century B.C. Theodotos or Diodotos, the governor of Baktra, revolted from his grandson Antiochos II. and made Baktra an independent kingdom. Not long afterwards Aśôka, the grandson of Chandragupta, as we learn from one of his own inscriptions,[22] sent missionaries to the kings of the West to proclaim to them and to their subjects the doctrines of Buddhism. The kings named in the inscription are Antiyoka (Antiochos II., king of Syria), Turamaya (Ptolemy III., Euergetes, king of Egypt), Antigona (Antigonas Gonatas, king of Macedonia), Maga (Magas, king of Kyrênê). About the year 212 B.C. Antiochos III., surnamed the Great, marched eastward to recover Parthia and Baktria which had both revolted from the second Antiochos. He was, however, unable, even after a war which lasted for some years, to effect the subjugation of these kingdoms, and accordingly concluded a treaty with them in which he recognised their independence. With the assistance of the Baktrian sovereign Euthydêmos, who founded the greatness of the Baktrian monarchy, he made an expedition into India, where he renewed the alliance with that country which had been formed in the days of Sandrokottos. From Sophagasenos,[23] the chief of the Indian kings, he obtained a large supply of elephants, and then returned to Syria by the route through Arachôsia in the year 205 B.C.

Fig. 7.—Euthydêmos.