DEUT993 As to the evils of war, the prophet had foreseen war's ultimate abolition; but, in the Talmud, wars were considered legitimate undertakings, even if their objective was to acquire booty and slaves. Berochot 3b. A "permitted war" (milhemet horeshut) was distinguished from a "mandatory war" (milhemet mizva), the former might be waged for such purposes as enlarging the boundaries of the country, or in order to subject a foreign city to slavery and to the payment of tributes. "If the city thus attacked offers to pay tribute, but does not accept enslavement, or if it accepts enslavement without paying tribute, its terms are not accepted until it undertakes to pay both."(This verse; Sifri, ad loc.) In the Mishnah, implements of war were deemed disgraceful reminders of human rapacity; hence, it was considered unlawful to wear a sword on the Sabbath. Shabbat 63a