Shared ground
Joshua 6:20–21 presents Jericho’s fall as the decisive breakthrough in Israel’s entry into Canaan. The narrative ties the moment to coordinated sound and action: priests blow trumpets, the people give a great shout, and the wall collapses so the attackers can go straight in and take the city (explicit in v.20).
The passage also states that the city’s inhabitants and specified livestock are killed “with the edge of the sword” (explicit in v.21). Whatever else is said about motives elsewhere in the chapter, these verses themselves describe both capture and wide-ranging destruction.
Where interpretation differs
Some readers take “the wall fell down flat” as describing a wall collapsing in place, becoming a kind of ramp or level access. Others think it means the wall fell outward or was flattened enough that there was no single breach point, matching “each straight ahead.” The text’s emphasis is the result—direct access—more than the mechanics (v.20).
Another difference is how to understand “utterly destroyed all that was in the city.” Some take it as a strict, complete description of what happened to every living thing listed. Others see it as conventional war reporting that stresses decisive victory and total defeat, even if not every individual detail is meant as a census-like claim. Either way, the text plainly intends to communicate comprehensive destruction (v.21).
Why the disagreement exists
The Hebrew expressions are brief and vivid. “Fell down flat” focuses on outcome rather than engineering detail, and “each straight ahead” can be read as either literal movement across a leveled perimeter or as a way of saying the assault was immediate and unhindered. Similarly, “utterly destroyed” is a strong stock phrase in ancient conquest accounts, which can be read either as exact description or as standard victory language.
What this passage clearly contributes
These verses complete the narrative build-up: the coordinated trumpet blast and shout are immediately followed by a wall-collapse that removes Jericho’s main defense (v.20). The capture is stated without tactical detail: access opens, entry happens, the city is taken (v.20).
They also establish the severity of the outcome. The text describes killing across age and gender categories and includes livestock (ox, sheep, donkey), portraying the defeat as total and leaving no ordinary spoils of a living city behind (v.21). Within Joshua’s larger storyline of promise-fulfillment, this scene functions as a dramatic first conquest that displays decisive victory and sets expectations for what “taking the land” can involve (inference from the book’s broader framing; see Joshua 21:45).