The War Department undertakes all issues related to the armed forces, whether they are the army, police, weapons equipment, war material, ammunitions or similar issues. They also include the military academies, military missions and whatever is needed of Islamic culture and general culture necessary for the army as well as anything else related to the war and preparation for it.

All this is undertaken and supervised by the War Department. Its name is connected with warfare and fighting. Warfare requires an army and the army requires preparation and formation including its staff commanders, officers and soldiers.

The army has its flags and banners. Its formation requires training, both physical and technical, which includes training in the fighting techniques using various weapons, according to contemporary advancement in technology. Therefore, it is imperative for the army to undertake military and technical study and to acquire training in fighting tactics, and the use of all the latest variety all manner of weapononry.

Since the army is an Islamic army and since it is the army of the Khilafah state which carries the Islamic Da’wa to the world, it is therefore imperative for the armed forces to acquire Islamic culture in general, and the specific Islamic culture related to the rules of fighting, peace, truces, treaties, agreements including all the detail required. Therefore, all military academies at various levels and military missions all fall under the mandate of the Department of War.

The armed forces must include also a division that is in charge of internal security i.e. the police. Both the armed forces and the police should have all the weapons, equipment, supplies and the necessary provisions they need to carry out their duty. This is why all these tasks fall under the Department of War.