Answer:
The Chaldeans were a Semitic-speaking tribe who were known for their cunning, diplomacy and wisdom and they were not known for military might, because they kept moving from place to place, before they migrated and settled in Mesopotamia before they were conquered by the powerful Assyrians.
King Nebuchadnezzar who ruled Babylon between 605c till 561bce was a Chaldean and was a powerful king, infact, he was the greatest and most popular of all Kings who were of the Chaldean tribe.
The Chaldeans were widely known for astrology, diplomacy, strategy, and witchcraft.