Introduction: Everything Follows After Peace
"Seek peace, and pursue it." (Psalms 34:15)
Rabbi Eleazar taught: Scripture does not say, "If peace happens to come to you," but "pursue it"—pursue peace wherever it may be found. Great is war in its dreadfulness, for the world was created with the attribute of Mercy, yet war is entirely Judgment and cruelty.
The sages said: The Torah did not command war except as an urgent and bitter remedy for a sick body. Just as a physician does not amputate a limb until every other option to save the body is exhausted, so Israel does not go out to war until every path to save lives and establish peace has been tried.
Chapter A: How Do We Go Out to War? "According to Judgment"
"When you go out to war against your enemies" (Deuteronomy 20:1).
Rabbi Judah expounded: "When you go out" means the departure must be legally authorized—not hasty, not an optional war of kings seeking glory, but a commanded war to defend what exists.
When do we go out? Only after calling the enemy city to peace: "When you draw near to a city to fight against it, then proclaim peace unto it" (Deuteronomy 20:10). Peace precedes war—even in a commanded war.
Rav Huna said: War must be conducted "according to judgment"—subject to the laws of the Torah and the morality of the Prophets. Do not say, "In a time of war there is no law." On the contrary: in war, extra precision in judgment is required, lest man become a beast.
Chapter B: Who Goes Out? "He That Hath Clean Hands and a Pure Heart"
The Torah exempts from battle the man who built a house and has not dedicated it, who planted a vineyard and has not used its fruit, who betrothed a wife and has not taken her (Deuteronomy 20:5–7)—so that their attention is not turned backward in battle, and so the world does not lose its settlement. Home, vineyard, and family are foundations of life; the Torah takes pity on their building.
"What man is there that is fearful and fainthearted?—let him go and return unto his house" (Deuteronomy 20:8).
- Rabbi Akiva: Fearful—literally unable to stand the rigors of battle and see a drawn sword.
- Rabbi Jose the Galilean: Fearful—because of transgressions, lest he be punished in battle.
- Later sages: Fearful—whose heart is too soft to harm innocents; whose wrath exceeds wisdom; who seeks revenge and not defense. Let him return, lest he defile the camp with unnecessary cruelty.
Resh Lakish said: The camp must be pure from robbery, slander, and blind hatred. Only he whose hands are clean and whose heart is pure—whose intention is defense—is worthy to go out.
Chapter C: Preservation of Nature in War
"You shall not destroy the trees thereof… for is the tree of the field a man, that it should enter into the siege before you?" (Deuteronomy 20:19).
Rabbi Hanina said: See how much pity the Torah has for the honor of creation. Even in emergency, when lives hang in the balance, it is forbidden to destroy a fruit-bearing tree. From here we learn Bal Tashchit—the prohibition of needless destruction.
If the Torah took pity on a tree, how much more on beasts, water, and air. The sword of war harms not only flesh but the soul of the earth. Israel must not use scorched-earth tactics: do not poison wells, burn fields, or uproot animals merely to instill terror. War is for life—not for destroying the infrastructure of life.
Rabbi Mani said: Even in siege, leave openings for animals to escape and do not waste resources in vain. He who protects nature in war shows that his mind is on the peace that will follow.
Chapter D: What Do We Do in a Siege?
Rav Shisha said: When you besiege a city, you do not besiege the image of God within it. Distinguish between combatants and civilians. It is a severe prohibition to withhold basic water and food from a civilian population to subdue them. If the Torah took pity on the tree from which man eats, will it not take pity on man himself?
Rav Assi said: There is an obligation to open a path for women, children, the elderly, and the sick to leave a siege. We learn this from the war against Midian, where one side was left open for flight. He who is not fighting must not be fought against. Withholding food and water from a population is a grave sin—of the ways of the Amorites—and has no place in Israel's camp.
Chapter E: Women Captives of War
"And you see among the captives a woman of beautiful form… then you shall bring her home to your house" (Deuteronomy 21:11–12).
Rabbi Ishmael expounded: The Torah speaks against the evil inclination—better they be taken permissibly than prohibitively. Yet the sages placed many fences around her: she shaves her head, pares her nails, and mourns her father and mother a full month—so she becomes unappealing to him and has time to mourn her ruined life. Great compassion is learned from here.
Later sages taught: The Torah spoke to its time. Today, when nations accept standards of human morality, it is a grave desecration to harm the dignity of a female captive. Rav Sheshet said: He who violates a woman's dignity in captivity desecrates the Sabbath and God's Name publicly. The Torah seeks to protect the weak; the captive woman is among the weakest. Treat her with honor, provide for her needs, and preserve the image of God in her—and in us.
Conclusion: The LORD Will Bless His People with Peace
"For the LORD your God walks in the midst of your camp, to deliver you… therefore shall your camp be holy" (Deuteronomy 23:14–15).
Rabbi Helbo taught: God dwells in the camp only when it is holy—when judgment, mercy, nature, and human dignity are preserved, especially in war.
"The LORD will give strength unto His people; the LORD will bless His people with peace." (Psalms 29:11)
May we no longer require wars, and merit the day when "Nation shall not lift up sword against nation, neither shall they learn war anymore."