en_tn/1sa/13/03.md

garrison of the Philistines

"military base of the Philistines" or "military camp of the Philistines"

Geba

This is the name of the town that the Philistine garrison was stationed in. (See: rc://en/ta/man/translate/translate-names)

All Israel heard that Saul had defeated

Possible meanings are that 1) Saul was taking responsibility for Jonathan's actions or 2) Saul was taking credit for Jonathan's actions.

Israel had become a rotten smell to the Philistines

The Philistines hating the Israelites is spoken of as if the Israelites had become a bad smell that offended the Philistines. AT: "the Philistines hated the Israelites" (See: rc://en/ta/man/translate/figs-metaphor)

the soldiers were summoned together to join Saul at Gilgal

This can be stated in active form. AT: "Saul called the soldiers together to join him at Gilgal" (See: rc://en/ta/man/translate/figs-activepassive)