'Strongholds' in the Bible

“Come down from your gloryAnd sit on the parched ground,O daughter dwelling in Dibon,For the destroyer of Moab has come up against you,He has ruined your strongholds.

“Kerioth has been capturedAnd the strongholds have been seized,So the hearts of the mighty men of Moab in that dayWill be like the heart of a woman in labor.

The mighty men of Babylon have ceased fighting,They stay in the strongholds;Their strength is exhausted,They are becoming like women;Their dwelling places are set on fire,The bars of her gates are broken.