Ministry
Throughout the years of Jihad and fighting and afterwards, the “Armed Forces” have been the constant companions with King Abdulaziz. They marched under his banner achieving many accomplishments, victories and laying the foundations of the high edifice.  They started with sixty men and grew to thousands to touch tens of thousands in number. 

These forces had no certain organizations, rather they had ‘traditions’ learned from their old heritage. They were divided into four major sections: “Najd folks, urban inhabitants, Bedouin settlements inhabitants, and Bedouins”. 

With the passage of time, King Abdulaziz envinsioned the need for command to take care of military issues and therefore he ordered the creation of the Military Affairs Administration. He assigned the new administration to lay the foundation for building a strong army based on Islamic tenets. A Royal Order was issued in 1348H-1929G establishing this administration. 
Divisions and sections were created, in addition to organizing the military units into machine gun, infantry and artillery units. 

Coping with the requirements of expansion and modernization, the Commander-in-Chief; King Abdulaziz, opined that ​​​the future required a body larger than the Military Affairs Administration to take on the army’s responsibilities; in terms of expansion, armaments, training and organization. Therefore, King Abdulaziz issued his Order No. 26/20/3 in Jumada Al Thani 1353H/1943G to create a Defense Agency in paraller with Military Affairs Administration. The Agency has taken strides for further organization and expansion in its' formations. Four branches have been created aligning with concept of organization. In addition to the three forces: Infantry, Artillery and Cavalry which were created previously, further detachments were created and distributed to the cities and seaports of the nascent country such as Jeddah, Madina, Abha, Taif, Dhaba, Yanbu, Tabuk, Al-Ola, Al-Wajh, and Makkah.

The foresight of the kingdoms' leadership respondeds to the dictates of modernization and did not hesitate to create any formation that boosteds the leadership aspirations of an enhanced army. The situation the required creation of a Presidency of the Chiefs of Staff, which would focus on the key military aspects such as training, armament, and development of the combat capabilities of the armed forces units. Over time, the Presidency of Chiefs of Staff replaced the Military Affairs Administration and took over its duties and responsibilities. In 1379H [1959G], a Royal Order was issued reforming the Presidency of Chiefs of Staff. After HRH Prince Sultan bin Abdulaziz (May Allah have Mercy on him) had taken over as Minister of Defense and Aviation, the Presidency of Chiefs of Staff developed immensely. The Presidency of Chiefs of Staff was reorganized and new commands were created for land, air, naval, air defense and strategic missile forces and allocated separate budgets to ensure their continuous growth and flexibility as envisioned in the implementation plans.

In 1432H [2011G], Custodian of the Two Holy Mosques, King Abdullah bin Abdulaziz (May Allah have Mercy on him), issued the Royal Order number A/226 dated 9/12/1432H [05/11/2011G] amending the nomination of Ministry of Defense and Aviation (MODA) to be the Ministry of Defense (MOD). In the reign of King Salman bin Abdul Aziz, the Commander-in-Chief of all military forces and under the supervision of HRH Prince Mohammed bin Salman, Deputy Crown Prince, Second Deputy Premier, and ​Minister of Defense, the development of the armed forces is continuing.