Siasa ya vita ni kusimamia mambo ya vita kulingana na hali ya jambo lenyewe, ili kuleta ushindi kwa Waislamu na kushindwa kwa maadui zao. Faida ya kivitendo ya haraka inaonekana wazi ndani yake. Shari'a iliruhusu ndani ya vita mambo ambayo iliyakataza nje ya vita, na ikakataza ndani ya vita mambo ambayo iliyaruhusu nje ya vita. Iliruhusu ndani yake kumdanganya adui, ilhali hilo limekatazwa nje ya vita. Kwa njia hii, ilifanya kwa siasa ya vita kanuni zinazochukuliwa kuwa mahsusi kwa vita. Miongoni mwa mambo haya ni yale yanayohusiana na kushughulika na adui. Miongoni mwa hayo kuna yanayohusiana na vitendo vya vita chenyewe, mengine yanahusiana na jeshi la Kiislamu, na mengine yanahusiana na mambo yasiyo ya haya.

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.