The Assyrian Monarchy followed that of the Chaldeans. The worship of the Assyrians seems to be identical with that of the Chaldeans with the exception that Asshur was considered the universal god.
Shalmaneser III, King at the time the Black-Obelisk was inscribed, honors Bel, the father of the gods, Beltis, the mother of the gods, and the sun god Shamas and Ishtar at the beginning of the inscription. He calls Asshur the king of all the four regions, the sun god of the multitude of mankind.
King Sennacherib of 2 Kings 19, and Isaiah 37: was a sun worshiper.
Quote: “the kings of Assyria have destroyed the nations and their lands, And have cast their gods into the fire: for they were no gods, but the work of men’s hands, wood and stone: therefore they have destroyed them. Now therefore, O LORD our God, I beseech thee, save thou us out of his hand, that all the kingdoms of the earth may know that thou art the LORD God, even thou only.”
This segment is excerpted from the book, “Too Long in the Sun”.