The LORD was also sovereign over Assyria and when He decreed that "she shall be led away captive," (Nahum 2:7) it was so. "Though Nineveh of old was like a pool of water, now they flee away." (Nahum 2:8) And the Assyrian empire came to an end.
"Nineveh is laid waste!
Who will bemoan her?" Nahum 3:7
"O LORD God of our fathers, are You not God in heaven, and do You not rule over all the kingdoms of the nations, and in Your hand is there not power and might, so that no one is able to withstand You?" 2 Chronicles 20:6