This refers to Nebuchadnezzar and his soldiers, not only to Nebuchadnezzar. Alternate translation: "Nebuchadnezzar's soldiers ... them" or "Nebuchadnezzar king of Babylonia and his soldiers ... them" (See: [[rc://en/ta/man/translate/figs-synecdoche]])
Although Nebuchadnezzar did not do these things alone, it may easier for the reader to retain the singular pronouns. Alternate translation: "They brought ... they placed" (See: [[rc://en/ta/man/translate/figs-synecdoche]])