1000 B
It will be like a dream, a vision of the night
The phrase "a vision of the night" is the same thing as "a dream." The two phrases emphasize that soon it will be like the invading army was never there. (See: rc://en/ta/man/translate/figs-doublet and rc://en/ta/man/translate/figs-simile)
A horde of all the nations
"Large armies from all the nations"
fight against Ariel
The name "Ariel" is another name for Jerusalem, and it represents the people who live there. See how you translated "Ariel" in Isaiah 29:1. Alternate translation: "fight against the people of Ariel" (See: rc://en/ta/man/translate/figs-metonymy)
her stronghold. They will attack her and her fortifications to press upon her
The word "her" refers to Ariel which represents the people who live there. Alternate translation: "their stronghold. They will attack the city of Ariel and its defenses and cause the people to be in great distress" (See: rc://en/ta/man/translate/figs-metonymy)