We're looking at ancient Judah around 697 to 609 BCE. The Assyrian Empire controls the entire Near East. They're brutal, efficient, and terrifying—the superpower of their time. They've already destroyed the northern kingdom of Israel in 722 BCE, deported its people, and left Judah standing alone. What was once a unified nation under David and Solomon is now just this small southern kingdom, paying tribute to Assyria just to survive.
Source:
https://drive.google.com/file/d/16TtV8xkF2PJaXEpBNi10MPg8SQ0HKygc/view?usp=sharing