For these verses, see 49.19-21. That passage was against the people of Edom, and this is against Babylonia.
The Chaldeans are the Babylonians (see 21.4).
Quoted with permission from Newman, Barclay M. and Stine, Philip C. A Handbook on Jeremiah. (UBS Helps for Translators). New York: UBS, 2003. For this and other handbooks for translators see here .