en_tn_condensed/isa/29/03.md

I will encamp against you

The word "I" refers to Yahweh. This represents Yahweh causing an enemy army to surround Jerusalem. Alternate translation: "I will command the army of your enemies to surround you" (See: rc://en/ta/man/translate/figs-metonymy)

palisade ... siege works

A "palisade" is a tower armies would build to attack cities with high walls. Also "siege works" refers to other various weapons armies would build to attack cities. (See: rc://en/ta/man/translate/translate-unknown)