When upon the fall of the Assyrian empire, in 606 B.C., Babylonia regained her full measure of independence, Marduk once more obtained undisputed sway at the head of the pantheon. True, so far as Babylonia was concerned, Marduk was always the acknowledged head, but during the period that Assyria held Babylonia in a more or less rigid form of subjection it was inevitable that Ashur should lower the prestige of Marduk. When the kings of Assyria paid their respects to Marduk, it was always as second in rank to Ashur; and, what is more, they claimed Marduk and the other gods of Babylonia as their own, and as upholders of their own sovereignty. When the kings feel impelled to invade the southern districts, they not only claim to be under the protection of the Babylonian gods, but they carry these gods with them into the land to be invaded. 'Bel and the gods of Akkad leave Assyria and go to Babylonia' is the official term in which a campaign against Babylonia is described.[331] In the eyes of the Babylonians such a haughty assumption on the part of the Assyrians must have been regarded as humiliating to Marduk, Nabu, and their associates. The state of affairs changed when Nebopolassar at the end of the seventh century once more claimed independent control over Babylonia. Marduk triumphs over Ashur. He is once more the great god, lord of gods, supreme king of the Igigi, the father of the Anunnaki--all titles that the Assyrians were fond of heaping upon Ashur. One feels the anxiety of Nebopolassar to emphasize the new order of things by attributing once more to Marduk what was formerly claimed for Ashur. The successor of Nebopolassar, the great Nebuchadnezzar, continues the policy of his father. He neglects no opportunity for exalting Marduk as the king, the creator, the leader of the gods, the lord of everything, the merciful one, the light of the gods, the all-wise. Nabu shares the honors with Marduk. Nebopolassar, indeed, accords to Nabu an equal share, and he does not hesitate at times to place the name Nabu before that of Marduk.[332] He does not speak of Nabu as the son of Marduk, and seems to be at particular pains to emphasize the equality of Nabu with Marduk. In this respect Nebopolassar presents a contrast to Hammurabi, who, it will be recalled, made an attempt to suppress the Nabu cult.[333] Nebopolassar, however, does not go to the extent of endeavoring to make Nabu supersede Marduk. He contents himself with manifesting his partiality for the former, and it is probably no accident that both his official name and that of his son contain the god Nabu as one of their elements, and not Marduk. One is inclined to suspect that this popularity of the Nabu cult is a trace of Assyrian influence. But whatever may have been Nebopolassar's intention in exalting Nabu at the cost of Marduk, Nebuchadnezzar restores the old relationship between the two. For him Nabu is again merely the son of Marduk, and he honors Nabu in this capacity.