He found means not only to restore his affairs but to retaliate on the Persian Empire.
He had conquered the whole western half of the Persian Empire.
The harm done to the Persian Empire by this defection was not measured by the mere loss of the revenues of a province.
In fact, we may regard him as the real founder of the Persian Empire.
The great Persian Empire was growing weak, and her subject cities were revolting from her.
From the third century onwards the Persian Empire had been the steadfast rival of the Byzantine.
But the religious fermentation of the world did not leave the supremacy of Zoroastrianism undisputed in the Persian Empire.
Before this chapter is concluded a few words must be said with respect to the countries which bordered upon the Persian Empire.
Darius succeeded in putting down the many rebellions and in thoroughly reorganizing the Persian Empire.
The disorganization of the Persian Empire became very manifest during this period.