The department of industry is the department that takes charge of all the affairs related to industry, whether they pertain to heavy industry like manufacturing of motors, engines, vehicles, materials, electrical equipment, or light industry. All factories public or private property, which have a relationship with the military industries, must be based on the war policy. This is because Jihad and fighting require an army, which requires weapons. In order that these weapons be of the highest level and fully available, it is necessary to have an industry within the State, particularly the military industry due to its strong relationship with jihad. .

In order that the State becomes independent of other countries and does not become influenced by any of them, it should manufacture and develop its own weapons by itself. This makes it independent and in continuous possession of the most advanced and strongest weaponry, regardless of the level of development and advancement of weapons. It would also have at its disposal, all that it needs of weapons to intimidate, both the evident and potential enemies, as Allah (S.W.T) says:.

“Make ready for them all you can of (armed) force and of horses tethered, that thereby you may dismay the enemy of Allah and your enemy, and others beside them whom you know not. Allah knows them.” [TMQ 8:60] .

As such the State would have its own will, produce the weapons that it needs and develop them continuously so that it owns the strongest and most developed weapons in order to terrify all the evident and potential enemies. Therefore it is a duty upon the State to manufacture weapons by itself and it is not allowed to depend upon other States, because this allows other States to control it, its will, its weapons and its fighting..