The Lydians initially rebelled, but the tradition holds that the unrest was short-lived and that Cyrus ordered the inhabitants of Sardis to be treated well except for the leaders of rebellion
Cyrus had previously asked the Ionians under Croesus' yoke to join the Persian Campaign, The Ionians refused and thus the new regime treated them harshly. A rebellion followed. The Medes Mazares and Harpagus were left to subdue the Greeks as Cyrus returned to the heartland of his empire
Herodotus states that Cyrus took Babylon using novel means. In Herodotus' version of events, the Persians defeated the Babylonians in battle near Babylon and besieging them. Cyrus drained the River Euphrates so that the Persians army could infiltrate the city
Cyrus persuaded the Persians to revolt by following Cyrus. Giving them a hard task one day and the next day giving them a big feast. Tells them if they go to war then they can have a feast everyday. He was inspirational leader of Persia
Harpagus got the message to Cyrus by slitting open a Hare and putting the message inside the hare's stomach. He then sent the servant to go to Persia with a net and was told to present the hare to Cyrus
Cyrus preferred to set up his own governors in realms he had conquered rather than vassal kings ( as Assyrians had done in outlying parts of their empire )
These governors need not be Persians - in Sardis Cyrus put Pactyes the Lydian in charge of the treasury ( which resulted in a revolt ), and Gubaru the Babylonians was 1st governor of Babylon
Many educated Jews had been brought back from Jerusalem by Nebuchadnezzar in 586; Cyrus gave them permission to return home and in 538 he sent Sheshbazzar as governor to Jerusalem with sacred utensils and treasure taken by Nebuchadnezzar 50 years before, with instructions to rebuild the temple