In 1884, it was transformed in the External Subsection of the Operation Section of the General Staff (Spoljni odsek Operativnog odeljenja Đeneralštaba) acting as the intelligence service of the Royal Serbian Army.

During World War I, when the General Staff was transformed into the Serbian Supreme Command, the Subsection for Reporting of the Operation Section became the Intelligence Subsection of the Operation Section of the Supreme Command (Obaveštajni odsek Operativnog odeljenja Vrhovne komande).

Subsequently, in 1950s it was renamed to the Intelligence Directorate the General Staff of the Yugoslav People’s Army (Obaveštajna uprava Generalštaba).

The Military Intelligence Agency has three missions:[2] Agency performs military intelligence tasks related to collection, analysis, assessment, protection and submission of data and information on potential and real threats, activities, plans or intentions of foreign countries and their armed forces, international organizations, groups and individuals.

Day of the Military Security Agency is celebrated on 5 March, the anniversary of forming the External Subsection of the Operation Section of the General Staff in 1884.