Beyond this indication of the state of the civilisation in these districts, we learn but little of their fortunes under the dominion of the Persians. Darius (521-485 B.C.) informs us, at the beginning of his reign, that his father Hystaspes (Vistaçpa), his viceroy in Persia, the native land of the kingdom, and with him Vivana the Persian, the satrap of Arachosia, and Dadarshis the Persian, the satrap of Bactria, had quelled the rebellions of the Parthians, Hyrcanians, and Margiani; that the Mede Takhmaçpada had conquered the rebellious Sagartians, and captured their leader, Chitratakhma, whom he, Darius, had crucified at Arbela. The army of the second Pseudo-Smerdis, which attempted to gain possession of Arachosia, Vivana had defeated at the fortress of Kapisakani, in Arachosia, and the leaders, with their chief associates, had been captured in the fortress of Arsada and put to death. Hystaspes had slain 6560 men of the Parthians and Hyrcanians, and taken 4182 of them captives. Dadarshis had subjugated the Mardians by slaying 4203 of them in battle, and taking 6562 of them captive.[35] Xerxes, the successor of Darius, successively intrusted two of his brothers, Masistes and then Hystaspes, with the government of Bactria.[36] In the great campaign against Hellas, the Bactrians, like all the other nations of the kingdom, had to furnish their contingent; and when Mardonius had to select the best troops in the army in Hellas, in order to winter with them in Thessaly, he retained, besides the Persians and Medes, the infantry and cavalry of the Bactrians, Sacæ, and Indians.[37] The Bactrians, under their viceroy Hystaspes, revolted against Artaxerxes, the brother of Hystaspes. The first battle was not decisive; in the second Artaxerxes conquered, "because the wind blew in the face of the Bactrians," and subjugated the land.[38] To the army of Darius III. with which he met the Macedonians in Assyria, the Bactrians contributed 30,000 cavalry; and in the battle of Arbela they fought with the Arachoti on the left wing. Accompanied by Bactrian horsemen, Darius escaped from the field of battle to Media, and sought afterwards to maintain his position in their country. The Caspian gates, the pass of Damaghan, were gained, when the satrap of Bactria got possession of the king, and put him to death before he reached Bactria. The satrap hoped to establish an independent power there,[39] but without success. Though Alexander at first overcame the Bactrians, who were astonished at his rapid approach, he soon found a stubborn resistance in Sogdiana and Bactria, which occupied him for two years.[40] Not till then could he make his preparations in Bactria for the invasion of India, and collect at Bactra the army intended for the subjugation of that country, in order to pass over the Hindu Kush into the valley of the Cabul.