God used the Babylonians under Nebuchadnezzar to sack Jerusalem ca. 605-586BC and take them captive to Babylon for 70 years because they had not given the land its yearly Sabbatical rest for 490 years. Some returned with Zurubbabel and Joshua in the first return (Ezra 1 - 6) to rebuild God's Temple ca. 539BC, some with Ezra in the second return (Ezra 7 - 10) in 458BC, and Nehemiah led the the third and final return to rebuild the wall of Jerusalem ca. 445BC.