Antiochus neither marched against Diodotus in person, nor sent a general to contend with him.

The authority of Diodotus was confirmed and riveted on his subjects by an undisturbed reign of eighteen years before a Syrian army even showed itself in his neighborhood.
The precedent of successful revolt thus set could not well be barren of consequences.

If one province might throw off the yoke of its feudal lord with impunity, why might not others?
Accordingly, within a few years the example set by Bactria was followed in the neighboring country of Parthia, but with certain very important differences.

In Bactria the Greek satrap took the lead, and the Bactrian kingdom was, at any rate at its commencement, as thoroughly Greek as that of the Seleucidae.

But in Parthia Greek rule was from the first cast aside.