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216 / 1113 · Deuteronomy 20 · Exodus & Wilderness · 15th or 13th century BC (debated); final written form also debated

The Rules of War

Debated
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Before a war, most armies do the opposite of what this chapter does. They shame the hesitant and drag every able body to the front. Here, before battle, officers walk through the ranks and send people home: the man who has built a house but not lived in it, the man who planted a vineyard and has not tasted its grapes, the man engaged to be married, and anyone who is simply afraid. The same chapter, though, contains one of the Bible's most troubling commands. Readers deserve both halves, told plainly.

Where it sits in the story: This is Act 3, as Israel stands on the edge of the land promised to Abraham. Deuteronomy 7 already spoke of 'devoting' the Canaanites to destruction; chapter 20 turns that into rules of war. Joshua and Judges will show how it played out, and how incompletely. The wider story also looks past it: the prophets picture nations streaming to Zion in peace, and Jesus tells his followers to love their enemies.

What this chapter is doing: To make Israel's wars depend on trust in God rather than numbers, to limit the ordinary brutality of ancient warfare, and to command the devotion of the Canaanite cities, which the text explains as a guard against their religious practices.

The walk-through
  • 20:1–4 — When Israel faces horses, chariots and a bigger army, they are not to panic: the God who brought them out of Egypt goes with them. A priest addresses the troops before battle to say so.
  • 20:5–9 — Officers send home any man with a new house, a new vineyard or a fiancée, so another does not enjoy what he began, and anyone fainthearted, so his fear does not spread. Only then are commanders appointed.
  • 20:10–15 — A distant city must first be offered terms of peace. If it accepts, its people become forced labourers. If it fights, its men are killed and its women, children and livestock taken as plunder, a grim picture of normal ancient conquest.
  • 20:16–18 — The cities of the six named Canaanite peoples are different: nothing that breathes is to be left alive. This is herem, 'devotion' to God by destruction. The reason given is that they would teach Israel their practices, including child sacrifice (Deuteronomy 18:10).
  • 20:19–20 — During a siege, fruit trees may not be cut down: 'Are the trees people,' the text asks, that they should be besieged? Only trees that bear no food may be used for siege-works.
⚖︎ How should the command to 'devote to destruction' the Canaanite cities be read?
Bounds
The text plainly commands leaving no one alive (20:16). Yet Joshua and Judges report Canaanites still living in the land (Judges 1), and ancient war reports elsewhere, like the Mesha Stele, use sweeping total-destruction language.
Positions
  • A literal, one-time divine judgment on specific peoples for their practices (compare Genesis 15:16), not a pattern for any later war; many traditional Christian and Jewish readers hold some form of this.
  • Stylised ancient war rhetoric: the language of total destruction was exaggerated, and the aim was to end Canaanite worship rather than kill every person; argued by some modern scholars.
  • A later ideal or theological portrait written long after the settlement, reflecting Josiah-era hostility to foreign worship rather than an event as it happened; common in critical scholarship.
Our reading: We set out all three and do not claim to settle them. Whichever view a reader takes, the text itself limits the command to named peoples at one moment, and later Jewish and Christian teaching has refused to treat it as a licence for war.
What it showsAncient Near Eastern inscriptions show that 'devoting' a conquered city to a god was a known practice; King Mesha of Moab's stele (9th century BC) uses the same Hebrew-related word for devoting an Israelite town.
Where the evidence stopsArchaeology does not show a single sweeping conquest of Canaan, and the historical relation between this command and what happened on the ground is strongly debated. The text's moral claims cannot be proved or disproved by digging.

Key verse: Deuteronomy 20:1  ·  So what: It would be dishonest to soften verses 16–18; they command the killing of whole populations, and Jews and Christians have struggled with them for centuries. It would also be dishonest to ignore that the same chapter sends frightened men home and protects fruit trees. Whatever a reader concludes, these verses have been misused to justify violence in later history, and faithful readers in both traditions have firmly refused that use.

← Cities of RefugeYou have just read the cities of refuge and the law of witnesses (Deuteronomy 19). Next come laws on unsolved murder, captive women, inheritance and a rebellious son (Deuteronomy 21), another chapter that needs careful reading.Blood, Captives and a Rebellious Son →
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