The Babylonian invasion (2 Kings 24:1-4)

The Babylonians did invade come during the reign of King Jehoikim.  They did not immediately lead the people in chains, but rather made the country a vassal state.  After three years, King Jehoiakim revolted against the Babylonians.  God then sent the Babylonians along with others to destroy Judah.  The stated rationale was because of the shedding of innocent blood by King Manasseh, years earlier (he led the country in child sacrifice).