Chaldea

Concise Bible Dictionary:

This was strictly the southern part of Babylonia, but the many references in scripture to the Chaldeans show that the inhabitants of the whole of Babylonia are alluded to by that name. Perhaps Ur is the only place in Chaldea proper to which scripture definitely refers. This was apparently a maritime city, which agrees with the country extending to the Persian Gulf; but the Gulf has receded far from where the river once joined it. The land of Shinar adjoined Chaldea on the north, in which were the early cities of Babel, Erech, Accad and Calneh (Gen. 10:1010And the beginning of his kingdom was Babel, and Erech, and Accad, and Calneh, in the land of Shinar. (Genesis 10:10)). The whole district was situated between the rivers Tigris and the Euphrates, but extended west of the latter. It was anciently well watered by canals, and is judged to have been productive. Herodotus says mounds were built where the river once spread like a sea through the whole plain. Now all is desolation, some parts very dry, and others a mere swamp, with lines of mounds in various directions. The prophecies declared that it would be so, but as stated above, they refer to the whole of Babylonia (Jer. 1:1010See, I have this day set thee over the nations and over the kingdoms, to root out, and to pull down, and to destroy, and to throw down, to build, and to plant. (Jeremiah 1:10); Jer. 51:24, 3524And I will render unto Babylon and to all the inhabitants of Chaldea all their evil that they have done in Zion in your sight, saith the Lord. (Jeremiah 51:24)
35The violence done to me and to my flesh be upon Babylon, shall the inhabitant of Zion say; and my blood upon the inhabitants of Chaldea, shall Jerusalem say. (Jeremiah 51:35)
; Ezek. 11:2424Afterwards the spirit took me up, and brought me in a vision by the Spirit of God into Chaldea, to them of the captivity. So the vision that I had seen went up from me. (Ezekiel 11:24); Ezek. 16:2929Thou hast moreover multiplied thy fornication in the land of Canaan unto Chaldea; and yet thou wast not satisfied herewith. (Ezekiel 16:29); Ezek. 23:15-1615Girded with girdles upon their loins, exceeding in dyed attire upon their heads, all of them princes to look to, after the manner of the Babylonians of Chaldea, the land of their nativity: 16And as soon as she saw them with her eyes, she doted upon them, and sent messengers unto them into Chaldea. (Ezekiel 23:15‑16)).

Jackson’s Dictionary of Scripture Proper Names:

as clod-breakers