en_tn_lite_do_not_use/jer/04/29.md

Every city

Here "city" represents the people living in the city. Alternate translation: "The people of every city" (See: rc://en/ta/man/translate/figs-metonymy)

cavalry

a group of soldiers riding horses

they will run into the forests

They will run away to the forests for safety.

The cities will be abandoned, for there will be no one to inhabit them

These two clauses have similar meanings. The second one strengthens the thought in the first. Alternate translation: "The cities will be empty. There will be no one left to live in them" (See: rc://en/ta/man/translate/figs-parallelism)