What does 2 Kings 18:13 mean?

In the fourteenth year of Hezekiah's reign, Sennacherib, king of Assyria, attacked all the fortified cities of Judah and captured them. 2 Kings 18:13 - Modern Text Bible

(Years later, Assyria turns its attention to Judah, conquering its strongholds and threatening Hezekiah's kingdom.)