A profound moral directive lies at the heart of the laws of warfare. Before an army draws a sword and initiates violent conflict, there is an obligation to try and resolve the dispute peacefully. This is not a mere military tactic, but a reflection of the attributes of God, who desires repentance and life rather than destruction. Choosing peace demonstrates a king's true heroism and good character, while also avoiding the unpredictable perils of the battlefield where even righteous and heroic individuals might fall [אברבנאל]. The power of peace is so significant that it must precede any armed conflict [דעת זקנים, צרור המור]. Ultimately, the goal of this peaceful approach is to guide the inhabitants of the opposing city toward spiritual and social wholeness [הכתב והקבלה].
The military approach described applies specifically to medium-sized cities, excluding massive metropolises or tiny villages [תורה תמימה, מלבי״ם, צפנת פענח]. The initial preparation for battle involves readying forces for direct combat or breaching walls, but it takes place before any harsh siege of starvation and thirst is imposed. Such extreme siege tactics are only enacted if the enemy rejects the offer of peace [תורה תמימה, מלבי״ם, אדרת אליהו].
Commentators debate the exact scope of this peaceful obligation. One perspective limits the requirement to discretionary wars, which are fought to expand borders. According to this view, there is no commandment to offer peace during the obligatory war against the seven Canaanite nations, as the primary goal was their eradication [רש״י, הדר זקנים, בכור שור]. When leaders like Moses and Joshua offered peace to these nations, it was either an act of personal virtue or because the official time for the conquest had not yet arrived [גור אריה]. Conversely, the primary approach among commentators asserts that the obligation to call for peace applies universally to all wars, including those against the Canaanite nations. The distinction between the types of wars only becomes relevant if the enemy refuses peace and chooses to fight. In a discretionary war, only the combatant men are killed upon victory, whereas in an obligatory war, all inhabitants are destroyed to entirely uproot idolatry. However, if any city from the Canaanite nations accepts the call for peace, its people are spared and accepted [רמב״ן, טור הארוך, רבנו בחיי, אברבנאל, ביאור יש״ר].
Accepting an offer of peace is not merely a ceasefire; it involves strict conditions. The inhabitants must commit to paying taxes and accepting servitude, which includes physical labor such as building walls, chopping wood, and drawing water [טור הארוך, רבנו בחיי]. Most importantly, they must abandon idolatry and accept the Seven Noahide Laws, which require establishing a justice system and refraining from bloodshed and theft [רמב״ן, רלב״ג, העמק דבר, רש ר הירש].
On a spiritual level, this martial law mirrors the internal human struggle. The city represents the human body, and the war is the soul's battle against negative inclinations. Seeking peace teaches that a person should not immediately suppress the body through extreme self-denial. Instead, one must find a balanced middle ground, utilizing physical drives in harmony to serve God [אור החיים, שפתי כהן]. Similarly, the city can be seen as an allusion to Jerusalem, with the battle directed against the impure forces that control it. In this light, the call for peace symbolizes the obligation to uproot the sin of baseless hatred, thereby meriting the city's complete restoration [אדרת אליהו - הבן איש חי].