Shared ground
Joshua 10:40–43 is a summary paragraph, not a full battle story. It gathers the whole “southern campaign” into a few broad claims: Joshua struck the land across several geographic zones, defeated the local kings tied to those areas, and returned to the base camp at Gilgal. The repeated “all” language (used multiple times in this unit) signals a sweeping, wrap-up style.
The passage also states the campaign’s meaning in the narrator’s terms: Joshua’s actions matched what Yahweh had commanded, and Israel’s success happened “because Yahweh … fought for Israel” (Joshua 10:42). Those are explicit claims in the text, not later interpretation.
Where interpretation differs
Some readers take the “all / none remaining / all that breathed” language as a strict, literal report that every person in the described area was killed and every site was fully cleared. Others understand the same phrases as standard ancient victory-summary wording that highlights decisive control and defeat of enemy leadership, without requiring that no survivors existed anywhere in the broader region.
A second, smaller question is what “at one time” means. Some read it as one continuous operation compressed into a single coordinated push; others take it more loosely as one campaign phase or season.
Why the disagreement exists
The disagreement mainly comes from how to read totalizing phrases in a summary (especially “all,” “left none remaining,” and “destroyed all that breathed”) when the broader book later mentions peoples still present in the land. That tension pushes interpreters either to read these lines very strictly, or to read them as a rounded, summary description of a campaign’s outcome rather than an itemized census.
What this passage clearly contributes
This paragraph closes the southern battle account by presenting (1) wide geographic reach (“from … to …”), (2) decisive defeat of the southern coalition’s kings, (3) claimed obedience to Yahweh’s command, and (4) theological causation: Israel’s victory is credited to Yahweh fighting for Israel. It also resets the narrative by moving everyone back to Gilgal, preparing for the next section.