RobH_en_tn/2sa/08/03.md

David then defeated Hadadezer

Here both "David" and "Hadadezer" represent their armies. Alternate translation: "David and his army then defeated the army of Hadadezer" (See: rc://en/ta/man/translate/figs-synecdoche)

Hadadezer ... Rehob

These are the names of men. (See: rc://en/ta/man/translate/translate-names)

Zobah

This is the name of a region in Aram. (See: rc://en/ta/man/translate/translate-names)

to recover his rule

"to regain control over a region" or "to recapture a region"