Charles Ellicott Commentary Isaiah 29:3

"And I will encamp against thee round about, and will lay siege against thee with posted troops, and I will raise siege works against thee." — Isaiah 29:3 (ASV)

I will encamp against you ... —The words describe the strategy of an Eastern siege, as we see it in the Assyrian sculptures—the mound raised against the walls of the city, the battering-ram placed upon the mound, and brought to bear upon the walls. (Ezekiel 4:2.)