scholar, how foolish can you be...
Your WTS admits that Assyria, the second world power came to its end as a result of the 14th and 17th year of Babylonian king Nabopolassar with the fall of Nineveh and then Harran. They claim that that was the start of Babylon's domination period as the third world power. They claim that Babylon came to its end when it was overthrown by Medo-Persia and that is when Medo-Persia became the fourth world power.
[Insight - The fall of the empire. The Babylonian Chronicle B.M. (British Museum) 21901 recounts the fall of Nineveh, the capital of Assyria, following a siege carried out by the combined forces of Nabopolassar, the king of Babylon, and of Cyaxares the Mede during the 14th year of Nabopolassar (612 B.C.E.)...According to the same chronicle, in the 14th year of Nabopolassar (612 B.C.E.), Ashur-uballit II attempted to continue Assyrian rule from Haran as his capital city. This chronicle states, under the 17th year of Nabopolassar (609 B.C.E.): “In the month Duʼuzu, Ashur-uballit, king of Assyria, (and) a large [army of] E[gy]pt [who had come to his aid] crossed the river (Euphrates) and [marched on] to conquer Harran.” (Ancient Near Eastern Texts, p. 305; brackets and parentheses theirs.) Actually, Ashur-uballit was trying to reconquer it after having been driven out. This record is in harmony with the account relative to the activity of Pharaoh Nechoh recorded at 2 Kings 23:29, which activity resulted in the death of King Josiah of Judah (c. 609 B.C.E.). This text states that “Pharaoh Nechoh the king of Egypt came up to the king of Assyria by the river Euphrates”—evidently to help him. “The king of Assyria” to whom Nechoh came may well have been Ashur-uballit II. Their campaign against Haran did not succeed. The Assyrian Empire had ended.]
[w65 6/1 - Babylon succeeded Assyria as the Third World Power.]
[Insight- Particularly was this domination manifest during the seventh and sixth centuries B.C.E. when Nabopolassar, a native of Chaldea, and his successors, Nebuchadnezzar II, Evil-merodach (Awil-Marduk), Neriglissar, Labashi-Marduk, Nabonidus, and Belshazzar, ruled the Third World Power, Babylon. That dynasty came to its end when “Belshazzar the Chaldean king was killed.”]
[w55 2/1 - The outstanding Absolute date for the B.C. period of the Hebrew Scriptures is that for the fall of Babylon as the capital city of the third world power at the hands of Cyrus, king of the Persians, October 13, 539 B.C., Julian calendar (or October 7 by our present Gregorian calendar), which event is referred to at Isaiah 45:1. This date is made Absolute by reason of the archaeological discovery and deciphering of the famous Nabunaid Chronicle, which itself gives a date for the fall of Babylon and which figure specialists have determined equals October 13, 539 B.C., according to the Julian calendar of the Romans.]
609 Nabopolassar 17th year - Fall of Harran
605 Nabopolassar 21st year and Nebuchadnezzar 1st year
587 Nebuchadnezzar 18th year
562 Nebuchadnezzar 43rd year
539 Belshazzar killed - end of Babylon as the 3rd world power
609+539=70 years