Deuteronomy 20 is Moses’ instruction to Israel about going to war, a chapter that readers often find startling because it describes battles, sieges and the destruction of certain cities. People look up Deuteronomy 20 to understand what it means, how its rules about warfare fit with the rest of the Bible, and what it asks of God’s people today. The short answer is that the chapter teaches Israel to trust the Lord above their weapons, to protect the vulnerable and to refuse the idolatry of the nations living in the land.
Deuteronomy 20 Summary
The chapter opens with a command not to fear when facing a stronger army, because the Lord who brought Israel out of Egypt goes with them. A priest is to encourage the troops before battle, and the officers then release men whose lives are unfinished, such as someone who has just built a house, planted a vineyard or become engaged, along with anyone who is too fearful to fight. Moses then sets out two different procedures: cities far away are first offered peace, while the cities of the nearby Canaanite peoples are to be devoted to destruction.
The final section gives rules for siege warfare, including a command not to cut down fruit trees to build siege works. The chapter ends with an exception for trees that are not food-bearing, which may be used for building. Throughout, the chapter moves from fear and dependence on God, to justice and restraint, to the protection of the land and its resources.
Background and Setting
Deuteronomy is the fifth book of the Torah, traditionally attributed to Moses and presented as his farewell addresses to Israel on the plains of Moab before they enter the promised land. Most scholars date its final form to a period well after Moses, often in the seventh century BC, though they still read it as a message spoken to Israel at the edge of the land. Its style is that of a covenant renewal, recalling God’s deeds and calling the people to faithful obedience.
Chapter 20 sits within a larger section of laws (chapters 12 through 26) that describe how Israel is to live as God’s holy people in the land. It belongs to the discussion of warfare, which follows directly on the rules about leadership and the king in chapter 17. The chapter was addressed to a people who expected to take the land and who needed to know how God wanted them to conduct themselves in conflict.
Deuteronomy 20 Section by Section
Verses 1-4: The Lord Who Goes Before You
1 When you go out to battle against your enemies, and see horses, chariots, and a people more than you, you shall not be afraid of them; for the LORD your God is with you, who brought you up out of the land of Egypt. 2 It shall be, when you draw near to the battle, that the priest shall approach and speak to the people, 3 and shall tell them, “Hear, Israel, you draw near today to battle against your enemies. Don’t let your heart faint! Don’t be afraid, nor tremble, neither be scared of them; 4 for the LORD your God is he who goes with you, to fight for you against your enemies, to save you.”
Deuteronomy 20:1-4 (WEB)
The chapter begins with a command that can seem almost impossible: when Israel sees greater numbers and stronger weapons, they are not to be afraid. The reason given is not Israel’s own strength but the presence of the Lord, the same God who rescued them from Egypt. Fear is the natural response to overwhelming odds, and Moses names it directly, then points his listeners to the one who has already acted on their behalf.
The priest’s speech in verses 3 and 4 gives this trust a voice. Before the army marches, someone speaks the promise aloud so that the people hear it again. The point is that courage in this text is not an inner mood that people must manufacture, but a response to what God has said and done.
Verses 5-9: Those Sent Home
5 The officers shall speak to the people, saying, “What man is there who has built a new house, and has not dedicated it? Let him go and return to his house, lest he die in the battle, and another man dedicate it. 6 What man is there who has planted a vineyard, and has not used its fruit? Let him go and return to his house, lest he die in the battle, and another man use its fruit. 7 What man is there who has pledged to be married a wife, and has not taken her? Let him go and return to his house, lest he die in the battle, and another man take her.” 8 The officers shall speak further to the people, and they shall say, “What man is there who is fearful and faint-hearted? Let him go and return to his house, lest his brother’s heart melt as his heart.”
Deuteronomy 20:5-8 (WEB)
Before the fighting, the officers release three kinds of men: the one who has built a house and not yet dedicated it, the one who has planted a vineyard and not yet eaten its fruit, and the one who is betrothed but not yet married. Each has a life that has been started and not finished, and the law lets them go home. The concern is for their future and for their families, and it reflects a community that values what people have begun to build.
The officers also release anyone who is fearful or faint-hearted, lest his fear spread to his companions. The army is not a machine that can absorb every man indiscriminately. God’s people are to face the battle as a community bound together in trust, and that trust is best served when the reluctant are not pressed into service against their will.
Verses 10-15: Peace Offered and Peace Refused
10 When you draw near to a city to fight against it, then proclaim peace to it. 11 It shall be, if it makes you answer of peace, and opens to you, then it shall be, that all the people who are found therein shall become forced laborers to you, and shall serve you. 12 If it will make no peace with you, but will make war against you, then you shall besiege it.
Deuteronomy 20:10-12 (WEB)
When Israel approaches a city far away, it must first offer peace. If the city accepts, its people become forced laborers rather than being killed. This is a striking provision, because it shows that war is not Israel’s first resort and that the offer of peace is meant to be real. A city that submits is spared the worst outcomes of conflict.
If the city refuses peace and makes war, Israel is to besiege it, and when the Lord gives the city into their hands, the men are to be struck down. The women, children, livestock and plunder may be taken by Israel. The passage is severe by modern standards, and readers should take its harshness seriously rather than explain it away, while noticing that the text still builds in an opening for peace before any violence begins.
Verses 16-18: The Nations Within the Land
16 But of the cities of these peoples, that the LORD your God gives you for an inheritance, you shall save alive nothing that breathes; 17 but you shall utterly destroy them: the Hittite, the Amorite, the Canaanite, the Perizzite, the Hivite, and the Jebusite; as the LORD your God has commanded you; 18 that they not teach you to follow all their abominations, which they have done to their gods; so would you sin against the LORD your God.
Deuteronomy 20:16-18 (WEB)
Verses 16 through 18 deal with the cities of the peoples the Lord is giving Israel as an inheritance, and here the command is full destruction. The text states its reason plainly: these nations practice abominations in the worship of their gods, and Israel must not be drawn into those practices. The concern is spiritual faithfulness, not a claim about the superiority of one ethnic group over another.
Readers have long debated how this passage fits with the wider witness of Scripture, which calls God’s people to justice, mercy and care for the stranger. Many Christians read it as an instruction tied to a particular moment in Israel’s history and as a warning about the seductive power of idolatry. The passage can be read as a call to guard the heart against whatever draws people away from the Lord.
Verses 19-20: Protecting the Living Land
19 When you shall besiege a city a long time, in making war against it to take it, you shall not destroy its trees by wielding an ax against them; for you may eat of them. You shall not cut them down; for is the tree of the field man, that it should be besieged by you? 20 Only the trees that you know are not trees for food, you shall destroy and cut them down. You shall build bulwarks against the city that makes war with you, until it falls.
Deuteronomy 20:19-20 (WEB)
The chapter closes with a surprising concern for the environment. When besieging a city for a long time, Israel is not to cut down fruit trees to build siege equipment, because the trees provide food and the people of the land are part of God’s creation. Only trees that are not used for food may be cut down and used for building the siege works.
This small law shows that restraint is required even in the middle of war. The text treats trees as more than resources to be consumed, and it protects the means of life even in a hostile setting. It reminds readers that the Lord cares for what grows, not only for those who fight.
Key Themes in Deuteronomy 20
- Trust over fear: The chapter repeatedly tells Israel not to be afraid, because the Lord is present and acting for them.
- Restraint and mercy: Peace is offered before war, and the lives of women, children and the reluctant are protected where possible.
- Faithfulness to God: The command to destroy the nearby nations is tied to the danger of adopting their idolatrous practices.
- Care for creation: Fruit trees are protected during siege, reflecting the value of life-giving things even in conflict.
- Community and dignity: Those with unfinished lives are sent home, showing that individual circumstances matter within the nation.
Lessons From Deuteronomy 20 for Today
Most readers will never lead an army, but the chapter’s call not to be ruled by fear applies to many situations. A person facing a difficult diagnosis, a stressful job or a family conflict can take the same stance Moses describes: name the threat honestly, then remember that the Lord is with them. The chapter does not deny the danger, but it refuses to let the danger have the final word.
The provisions about peace and restraint also speak to modern conflicts, whether between neighbors, coworkers or nations. The text insists that peace should be offered before force is used, and that the vulnerable should be shielded where possible. A believer who speaks up for a fair settlement, or who refuses to exploit an opponent’s weakness, is living out the spirit of this chapter.
Finally, the concern for the fruit trees invites a practical question about how we treat the world God made. A family that tends a garden, a farmer who protects the soil, or a city council that preserves green space is honoring the same care for life that appears in verses 19 and 20. Creation is not an obstacle to be cut down for convenience, but a gift to be stewarded.
Questions for Reflection
- When have you faced a situation that felt too large to handle, and what would it look like to remember that the Lord is with you?
- How does the offer of peace before war challenge the way you handle conflict in your relationships?
- What does this chapter teach about the danger of being drawn into the practices of the culture around you?
- Where in your daily life can you show restraint and care for the things that sustain life, including the natural world?
A Prayer From Deuteronomy 20
Lord, you have gone before your people in every generation, and you have not left me to face my fears alone. When the battles I face seem larger than my strength, help me to remember who you are and what you have already done. Keep my heart from fainting, and give me courage that rests on your presence rather than my own ability. Teach me to seek peace where I can, to protect those who are vulnerable, and to guard my heart from every idol that would pull me away from you. Amen.
Frequently Asked Questions
Why does Deuteronomy 20 tell Israel not to be afraid?
The chapter grounds courage in the presence of the Lord, who brought Israel out of Egypt and promises to fight for them. Fear is acknowledged as a real response, but the text points the people to God’s faithfulness rather than their own strength.
Why were some men sent home before the battle?
The officers released men with unfinished lives, such as a new house, a vineyard or an engagement, as well as anyone too fearful to fight. This reflects concern for their families and for the morale of the army as a whole.
Why does Deuteronomy 20 protect fruit trees during a siege?
Fruit trees provide food and are part of the life God gives to the land. The law forbids cutting them down for siege works and allows only non-food trees to be used, showing restraint even in the middle of war.
