What does 2 Kings 18:17 mean?

Then the king of Assyria sent his top officials—his commander, chief officer, and field commander—with a huge army to confront Hezekiah in Jerusalem. They marched up and stopped at the aqueduct of the Upper Pool, right by the road to the Washer’s Field. 2 Kings 18:17 - Modern Text Bible

(The Assyrian king responds to Hezekiah’s surrender by sending a powerful delegation to Jerusalem, making a show of force right outside the city.)