'Fortress' in the Bible

“The fortified city will disappear from Ephraim,And the kingdom from DamascusAnd the remnant of Aram (Syria);They will be like the [departed] glory of [her ally] the children of Israel,”Declares the Lord of hosts.

And the king of Assyria sent the Rabshakeh [his military commander] from Lachish [the Judean fortress commanding the road from Egypt] to King Hezekiah at Jerusalem with a large army. And he stood by the canal of the Upper Pool on the highway to the Fuller’s Field.