The aftermath of conquest often involves calculated political strategy rather than total destruction. When the King of Babylon took control of Judah, his intention was not to wipe the nation off the map. Instead, he designed a system to keep the kingdom small, dependent, and entirely under his authority.
The primary approach among commentators is that this historical reality serves as the direct meaning behind the parable of the vine presented earlier in the chapter. The King of Babylon secured guarantees to ensure Judah remained a submissive state. While the local government retained some control over its own land, it was completely subservient to Babylonian rule. This political setup directly mirrors the image of the spreading vine in the parable. By keeping the nation in a weakened state, the Babylonian king ensured that Judah could never rise up and launch a rebellion, reflecting the parable's description of the vine as being low in stature.
The very survival of Judah depended on one strict condition: absolute loyalty to the treaty forged with Babylon and the new king placed on the Judean throne. Just as the vine in the parable directed its branches toward the eagle, Judah had to direct its allegiance to Babylon. The primary approach among commentators is that the kingdom's ability to endure relied entirely on upholding this covenant. Maintaining the agreement was the only way to guarantee Judah's continued existence and right to survive.