In King Hezekiah's fourth year,1 which was the seventh year of Hoshea son of Elah king of Israel, Shalmaneser king of Assyria marched against Samaria and laid siege to it.
References for 2 Kings 18:9
At the end of three years the Assyrians took it. So Samaria was captured in Hezekiah's sixth year, which was the ninth year of Hoshea king of Israel.
The king2 of Assyria deported Israel to Assyria and settled them in Halah, in Gozan on the Habor River and in towns of the Medes.3
References for 2 Kings 18:11
This happened because they had not obeyed the LORD their God, but had violated his covenant4--all that Moses the servant of the LORD commanded.5 They neither listened to the commands6 nor carried them out.
References for 2 Kings 18:12