Yugoslav People's Army

The Yugoslav People's Army (abbreviated as JNA/; Macedonian and sr-Cyrl-Latn, Југословенска народна армија, Jugoslovenska narodna armija; Croatian and bs, Jugoslavenska narodna armija; sl, Jugoslovanska ljudska armada, JLA), also called the Yugoslav National Army, was the military of the Socialist Federal Republic of Yugoslavia and its antecedents from 1945 to 1992.

Origins

The origins of the JNA started during the Yugoslav Partisans of World War II. As a predecessor of the JNA, the People's Liberation Army of Yugoslavia (NOVJ) was formed as a part of the anti-fascist People's Liberation War of Yugoslavia in the Bosnian town of Rudo on 22 December 1941. After the Yugoslav Partisans liberated the country from the Axis Powers, that date was officially celebrated as the "Day of the Army" in the Socialist Federal Republic of Yugoslavia (SFR Yugoslavia).

In March 1945, the NOVJ was renamed the "Yugoslav Army" ("''Jugoslavenska/Jugoslovenska Armija''") and, on its 10th anniversary, on 22 December 1951, "People's" ("''Narodna''") was added.

The support the Soviets had within JNA ranks during the Informbiro period, after 1948, is contested. Low-end estimates indicate that 10–15% of the army's personnel favoured the Soviet position. Yugoslav sources estimate the number of military members arrested ranged from 4,153 officers and soldiers (estimated by Radonjić), to 7,000 imprisoned officers estimated by Milovan Đilas. The purge included 22 officers in the presidential guard regiment reporting directly to Tito, including Momčilo Đurić, wartime commander of the Yugoslav Partisan Supreme Headquarters escort battalion. During this period of Soviet blockade, the Yugoslav Army's development stagnated.

Forty-nine Yugoslav Army graduates of the General Staff Academy, the Frunze Academy, and other Soviet military academies were deemed potential Soviet supporters. Many of those attending such academies in the USSR at the time of the Tito–Stalin split never returned to Yugoslavia.

The split particularly affected the Air Force. Almost all Air Force officers had Soviet training, and some of them fled Yugoslavia in Air Force planes. The defectors included Major General Pero Popivoda, who was the head of the Air Force operational service. The Batajnica, Zemun, and Pančevo airbases near Belgrade saw several attacks by groups of saboteurs. The Zemun airbase commander and his deputy fled to Romania.

Between 1948 and 1955, the United States gave Yugoslavia US$600 million in direct military grants and an equal amount in economic aid, enabling Yugoslavia to devote more of its domestic resources to defence. After two visits to the United States by Colonel General Kocha Popovic and Colonel General Kilibarda in May–June and August 1951, respectively, U.S. weaponry began arriving by late 1951. By 1952 the Armed Forces had grown to 500,000 troops, and defence expenditures consumed 22 percent of the gross national product. A Military Assistance Advisory Group (MAAG) of 30 officers commanded by General Harmody was established by the United States in Belgrade in 1951. It operated for ten years, disbursing military grants and arranging another US$1 billion in arms sales on favorable terms. Among weapons transferred were 599 M-4A3
tanks, 319 M-47 tanks, 715 M-7, M-l8, and M-36 self-propelled guns, 565 M-3A1 and M-8 armored cars, and a total of total of 760 105mm,
155mm, and 203mm artillery pieces. The artillery pieces delivered were used to reequip artillery units within Yugoslavia's eight divisions.

Task and command structure

Under the constitution and laws of SFR Yugoslavia, the Yugoslav People's Army was a part of the armed forces with the Territorial Defense (Yugoslavia) as the joint armed forces of all working people and citizens of Yugoslavia.

The main task of the Yugoslav People's Army was to protect the independence, sovereignty, territorial integrity and social organization of the Socialist Federal Republic of Yugoslavia.

Though the Presidency of Yugoslavia was the supreme commander of the armed forces and in command of Yugoslav People's Army, some duties from the presidency could be given to the Secretary of Defence. The Secretary of Defence was the officer with the highest military rank that could command the armed forces, including the Yugoslav People's Army and Territorial Defense. The President of Yugoslavia had the power to promote members of the military to the highest military ranks such as general or admiral, and to relieve duty of the highest military officers. The Chief of Staff of the Yugoslav People's Army, in the case that the Secretary of Defense was prevented or absent to fulfill his function, was formally his deputy who could take command of the armed forces. In 1987, under decree of the Presidency of Yugoslavia, the General Staff of the JNA was renamed to the General Staff of the Armed Forces of Yugoslavia, thus effectively giving command of JNA and the TO to one military body in order to more efficiently command the armed forces in case of war, according to the law of "All-people's defense" from 1982.

Organization

Structure and organization in late 1980s and at beginning of 1990s

In the mid-1980s, plans were made under a formal top-secret strategic and operational plan named "Jedinstvo" (Eng. "unity") for a structural change from republic armies and divisions to military districts and brigades to allow for easier federal consolidation of the republics' territorial armies, particularly in the case of a crisis.

Because of internal and external security changes during that time, "Jedinstvo" was later modeled in three parts: "Jedinstvo 1", "Jedinstvo 2", and "Jedinstvo 3", starting from 1987 (with a planned completion date of 1995) for the JNA to start major reform.

The first part of JNA major overhaul under "Jedinstvo 1" had its basic force structure nearly completed in 1989. Manpower was planned to be reduced to about 1 million in wartime, while in peacetime it would be 299,057 personnel including officers, soldiers and the civilian workforce, including civil service. Equipment purchase was not realized in full.

The JNA's organization and structure after "Jedinstvo 1" consisted of the Ground Forces, Air Force and Navy. Under reforms through the "Jedinstvo" plan it was planned to reorganize the army's structure into four major army areas called "Vojna Oblast" under command of SSNO (''Савезни секретаријат за народну одбрану'' (''ССНО'') – The Union's Secretariat for People's Defence, the federal ministry of defence) - "Vojna oblast" or military regions were further divided into corps, brigades, garrisons and smaller districts and sectors that were responsible for administrative tasks such as draft registration, mobilization, and construction and maintenance of military facilities. The regions were:

*The first military region with headquarters in Belgrade (responsible for eastern Croatia, northern and central parts of Serbia and parts of Bosnia and Herzegovina)
*The second military region with headquarters in Zagreb (Slovenia and northern Croatia)
*The third military region with headquarters in Skopje ( Macedonia, Southern Serbia and Montenegro)
*The military-naval region "Vojnopomorska Oblast" with its headquarters in Split. Military-Naval Region included parts of Croatia, Bosnia and Herzegovina and Montenegro - almost all Yugoslavia coastline. It had subdivisions on three sectors including flotilla and one corps.

Directly under SSNO were the Guard's motorized brigade, school centers, three SIGNAL regiments, a light anti-aircraft artillery regiment, and a few independent battalions and divisions.

In the "Jedinstvo 1" reforms, JNA eliminated most of its old divisional infantry organization and established the brigade and corps structure with some independent units under direct command of SSNO. Territorial defense was also changed and laws and the constitution were amended to address those changes. The Ground Forces "converted ten of twelve infantry divisions into twenty-nine tank, mechanized and mountain infantry brigades with integral artillery, air defense and anti-tank regiments under corps structure. One airborne brigade was organized before 1990. The shift to brigade-level organization provided greater operational flexibility, maneuverability, and tactical initiative and reduced the possibility that large army units would be destroyed in set piece engagements with an aggressor. The change created many senior field command positions that would develop relatively young and talented officers." In 1989, five independent divisions under general staff command and 25 partisan (reserve) divisions under corps command were formed including many other battalions, regiments and batteries under different commands.

The 1989 plan "Jedinstvo 2" commenced and border battalions were transferred under corps command including some divisions that have remained before under others commands. Brigades got some artillery and antiaircraft batteries under their direct command that helped them to gain independence in wartime from higher levels. Defense of all major cities was previously planned with separate units but under "Jedinstvo 2" only Belgrade and Zagreb retained separated units for defense of their cities.

There were usually three classes of brigades, regiments and battalions:
* A. class
* B. class
* R. class.

A. class brigades and battalions were more than 60 to up to 100% manned, and B. class units had 15-60% manpower. R. class units were reserved with about 15-20% and was manned mostly in their logistic units and commands.

Battalions with A. class status were 100% manned and equipped. A. class brigades had a brigade HQ and 4 battalions and B class brigade had 2-3 battalions with HQ.

The "Jedinstvo 3" plan started in 1990. To the military leadership of the JNA, it was obvious that USSR was moving to defend its internal borders and the only global superpower left was the USA. It was then agreed in JNA that potential for aggression from the Warsaw Pact had diminished but potential aggression from NATO had increased. The new plan "Jedinstvo 3" included changes to organize better defenses from new perceived external threats. The plan required the building of smaller but more modernized forces with highly mobile units. Corps closer to the border would have two A. class brigades including an artillery regiment of A. class, an anti-armor regiment of B. class and an engineering battalion of A class. Corps deeper inside country would have one brigade of A. or B. class.

Under "Jedinstvo 3" every corps in the Air Force should have one support aviation brigade, one fighter wing, one Air Surveillance, Early Warning and Guidance regiment, 1-2 rocket brigades or regiments and rest up to possibilities to equip.

Under "Jedinstvo 2", the JNA on 1 January 1990 had:
* 5 divisions - 2 R. and 3 B. class
* 23 partisans divisions of R. class
* 72 partisans brigade of R. class
* 20 infantry brigades - 2 A., 10 B. and 8 R. class
* 17 infantry regiments - 5 B. 12. R. class
* 7 hill brigades - 3 B. 4 R. class
* 1 mountain brigade B. class
* 32 motorized brigades - 4 A., 21 B. and 7. R. class
* 2 marines infantries brigades B. class
* 1 Guard motorized brigade A. class
* 6 Armor brigades of B. class
* 11 Mechanized brigades - 7. A. class, 3. B. class and 1 R. class
* 1 artillery rocket brigade B. class
* 6 mixed artillery brigades B. class
* 5 mixed anti-armor artillery brigades B. class
and many others, including 19 military police battalions and river flotilla giving in total 28 divisions, 307 brigades and regiments and 137 independent battalions/divisions.

Under "Jedinstvo 3" until 1995, the structure of the JNA was:
* 1 Mechanized division in A. class
* 18 Partisans divisions of R. class
* 7. Motorized brigades of R.class
* 39 motorized brigades - 7 A. class
* 17 mechanized brigades - 15 A. and 2 R. class

There were other units that had smaller but more modern and mobile forces with more mobile A class units with a total of 19 divisions, 234. brigades and 104 independent battalions/regiments in 1995. Total manpower at the end of 1995 was about 222.151 in peace and 834.891 in war.

Internal changes in Yugoslavia prevented the total realization of the "Jedinstvo 3" plan. While many changes under it were done during 1990, not all were finished completely. While most commands and units were formed and manned, equipping was not finished according to plan because of dissolution of Yugoslavia and stopping of deliveries from most of domestic factories to units of JNA.

As part of the armed forces, there was also the Territorial Defense, based on each republic's territory that formed Yugoslavia that would fall under command of JNA during wartime.

Ground Forces

The Ground Forces had the greatest number of personnel. In 1991 there were about 140,000 active-duty soldiers (including 90,000 conscripts), and over a million trained reservists that could be mobilized in wartime. Each of the Yugoslav constituent six republics had its own Territorial Defence forces which were similar to the US national guard and were subordinate to supreme command as an integral part of the defence system in wartime. The territorial defence (reserve force) was made up of former conscripts; they were occasionally called up for war exercises.

The ground forces were organised into infantry, armour, artillery, and air defence, as well as signal, engineering and chemical defence corps.

Air Force

The Yugoslav Air Force had about 32,000 personnel including 4,000 conscripts, and operated over 400 aircraft and 200 helicopters. It was responsible for transport, reconnaissance and rotary-wing aircraft as well as the national air defence system. The primary air force missions were to contest enemy efforts to establish air supremacy over Yugoslavia and to support the defensive operations of the ground forces and navy. Most aircraft were produced in Yugoslavia. Missiles were produced domestically and supplied by the Soviet Union.

The Yugoslav Air Force had twelve squadrons of domestically produced ground attack fighters. The ground attack squadrons provided close air support to ground force operations. They were equipped with 165 new Soko J-22 Orao, Super Galeb and J-21 Jastreb, and older Soko J-20 Kraguj fighters. Many ground attack fighters were armed with AGM-65 Maverick air-to-surface missiles purchased from the United States. Others were armed with Soviet Kh-23 and Kh-28 missiles. The air force also had about ninety armed Mi-8 helicopter gunships to provide added mobility and fire support for small ground units. A large number of reconnaissance aircraft were available to support ground forces operations. Four squadrons of seventy Galeb, Jastreb, and Orao-1 fighters were configured for reconnaissance missions.

The Yugoslav Air Force had nine squadrons of 130 Soviet-made MiG-21 interceptors for air defence. First produced in the late 1950s, the MiG-21 design was largely obsolete in 1990 and represented a potential weakness in Yugoslavia's air defence. However, the bulk of the MiG-21 fleet consisted mainly of the ''bis'' variant, the latest production MiG-21 model, and was armed with the Soviet Vympel K-13 ( NATO reporting name: AA-2 "Atoll") missile, air-to-air missiles and some Molniya R-60 (NATO reporting name: AA-8 "Aphid") missiles as well as twin 23 mm cannons. By 1989, Yugoslavia started developing a new domestic multirole fighter plane called Novi Avion, which was supposed to replace the MiG-21 and J-21 Jastreb fleets entirely. The design of the new aircraft was influenced by the Mirage 2000 and Dassault Rafale fighter types and it was to enter service by the early 2000s. As an interim solution, a modernization package was planned for the MiG-21 and it is speculated that India's MiG-21 Bison upgrade was actually intended for Yugoslav aircraft. In 1987, Yugoslavia acquired 16 MiG-29s.

Although not officially known at the time, Yugoslavia was rumoured to have been interested in the purchase of Su-25 attack-aircraft and Mi-24 gunships. Instead of developing its own fighter plane, the Novi Avion, the country made a request to licence-build the F-20, but due to unstable relations with the US, the request was rejected. By the late 1980s, the licensed production of Aérospatiale SA 330 Puma helicopters was also planned, but due to the dissolution of the country, it was not continued.

One of the structures operated by the Yugoslav Air Force was the underground Željava Air Base near the town of Bihać in northwest Bosnia and Herzegovina. The structure was made to withstand a nuclear explosion and was destroyed by the JNA in 1992 to prevent its capture. Željava was home to the 117th Fighter Aviation Regiment, which was composed of the 124th and 125th Fighter Squadrons, equipped with MiG-21Bis fighters, and the 352nd Reconnaissance Squadron, equipped with MiG-21R aircraft.

The Air and Air Defence Forces were headquartered at Zemun and had fighter and bomber aircraft, helicopters, and air defence artillery units at air bases throughout the former Yugoslavia: Batajnica Air Base (Belgrade), Niš Constantine the Great Airport, Slatina Air Base (Priština), Golubovci Airbase (Titograd), Skopski Petrovec, Sarajevo, Mostar, Željava Air Base (Bihać), Pleso (Zagreb), Split Airport, Pula, Zemunik (Zadar), Cerklje ob Krki

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