en_tn/1ch/18/12.md

Abishai...Zeruiah

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

18,000 Edomites

"eighteen thousand Edomites" (See: rc://en/ta/man/translate/translate-numbers)

Valley of Salt

This is the name of a valley between Edom and Judah that was used as a battlefield.

garrisons

groups of soldiers assigned to a particular area.

all the Edomites became David's servants.

"the people of Edom were forced to accept David to be their king and to pay money to David's government every year." (See: rc://en/ta/man/translate/figs-ellipsis)