Siyasar yaƙi ita ce kula da al'amuran yaƙi bisa ga matsayin al'amarinsa, don a samu nasara ga Musulmi da kayar da abokan gābansu. Abin da ke bayyane a cikinta shi ne gagarumin aiki na zahiri. Shari'a ta halatta a cikin yaƙi abubuwan da ta haramta a wajen yaƙi, kuma ta haramta abubuwan da ta halatta a wajensa. Ta halatta a cikinsa yin ƙarya ga abokin gaba, alhali kuwa haramun ne a wajen yaƙi. Ta haka ne ta sanya wa siyasar yaƙi dokoki da ake ɗauka na musamman ga yaƙi. Daga cikin waɗannan la'akari akwai waɗanda suka shafi mu'amala da abokin gaba. Daga cikinsu akwai abin da ya shafi ayyukan yaƙin kansa, sauran kuma suna shafar rundunar Musulmi, sauran kuma suna shafar wasu al'amuran banda waɗannan.

War policy is taking care of the affairs of war upon the position of its matter so as to make the victory for Muslims and defeat for their enemies. The immediate practical aspect is apparent in it. The Shar’a allowed within war things it forbade in other than it, and forbade things within it that it allowed in other than it. It allowed within it lying to the enemy whereas this is forbidden in other than war. In this way, it made for the war policy rules considered specific to war. From these considerations are those related with regards to dealing with the enemy. Of these is what is related to the actions of war itself, others are related to the Islamic army and others related to other than these.