Croatian National Guard

The Croatian National Guard (Croatian: Zbor narodne garde or ZNG) was an armed force established by Croatia in April and May 1991 during the Croatian War of Independence. Although it was established within the framework of the Ministry of the Interior for legal reasons, the ZNG was under the direct command of the Ministry of Defence. It was tasked with the protection of Croatia's borders and territory, and with tasks normally associated with police forces. The ZNG was formed with the transfer of special police units to the ZNG, establishing four all-professional brigades in May 1991, and was presented to the public in a military parade in Zagreb on 28 May. It was commanded by Defence Minister General Martin Špegelj before his resignation in early August. Špegelj was replaced by General Anton Tus, who became the first head of the General Staff of the Armed Forces of the Republic of Croatia (established on 21 September).

During its development the ZNG experienced a number of problems, including shortages of weapons and ammunition, lack of uniforms, inadequate training and an overall deficiency in trained officers, and poor staff work and command structures (preventing the effective coordination of multiple units). These problems were offset by good morale, clear objectives and high levels of mobilisation. After the Battle of the Barracks, the ZNG expanded significantly with arms captured from the Yugoslav People's Army (Jugoslovenska Narodna Armija). By the end of October 60 new brigades and independent battalions were established, and on 3 November the ZNG was renamed the Croatian Army (Hrvatska vojska).

In 1990, after the electoral defeat of the government of the Socialist Republic of Croatia by the Croatian Democratic Union (Croatian: Hrvatska demokratska zajednica, HDZ), ethnic tensions between Croats and Croatian Serbs worsened. The Yugoslav People's Army (Jugoslavenska narodna armija – JNA) believed that Croatia would use the Croatian Territorial Defence Force's (Teritorijalna obrana – TO) equipment to build its own army and confront the JNA. To minimize the expected resistance, the JNA confiscated the TO's weapons. On 17 August tensions escalated into an open revolt by the Croatian Serbs, centred on the predominantly Serb-populated areas of the Dalmatian hinterland near the southern town of Knin, parts of the Lika, Kordun and Banovina regions and eastern Croatia. They established a Serbian National Council in July 1990 to coordinate opposition to Croatian President Franjo Tuđman's policy of pursuing independence for Croatia. Milan Babić, a dentist from Knin, was elected president and Knin police chief Milan Martić established paramilitary militias. The two men eventually became the political and military leaders of the SAO Krajina, a self-declared state incorporating the Serb-inhabited areas of Croatia.

The JNA learned about Croatia's intention to develop its own military force from JNA Captain Vladimir Jager, a double agent employed by Croatia and the JNA Counterintelligence Service (KOS). The JNA devised Operation Shield (Štit), aimed at disarming the Croatian forces and the arrest and trial of the Croatian leadership, in response. Although the operation was prepared by December 1990, federal Defence Minister General Veljko Kadijević never sought authorisation to carry it out from the Yugoslav Presidency. Instead, he ordered the KOS to stand down on the morning the operation was scheduled to begin.

At the beginning of 1991 Croatia had no regular army, and to bolster its defence Croatia doubled the size of its police force to about 20,000. The most effective part of the force was the 3,000-strong special police, deployed in a military organisation of 12 battalions; in addition, there were 9,000–10,000 regionally-organised reserve police officers. Although the reserve police were set up in 16 battalions and 10 companies, they lacked weapons (which were needed to arm the troops).

Preparations for the ZNG began on 12 April 1991. Its formation as a police force with military capability was considered necessary by Croatian authorities after March clashes in Pakrac and at Plitvice Lakes and the possibility of further confrontation with the JNA. Since it was illegal to establish a separate military in a constituent republic of Yugoslavia, the ZNG was planned as part of the police force under the Ministry of the Interior. Parliament amended the Internal Affairs Act on 18 April, and the ZNG was formally established five days later. It was tasked with the protection of the constitutional order, the maintenance of public order, anti-terrorist operations, the protection of Croatia's borders, territory, coast and territorial waters, valuable structures and high-profile individuals. Although the ZNG was formally subordinate to the Ministry of the Interior, its founding legislation stipulated that it would be commanded by the Ministry of Defence.

On 5 May the number of ZNG troops and their composition was determined, followed by operational guidelines issued by Defence and Interior Ministers Martin Špegelj and Josip Boljkovac for the transfer of police personnel to the ZNG on 10 May. By 15 May several special police units (SPUs) transferred to the ZNG, forming four brigades. By July the ZNG had approximately 8,000 troops and, unlike other Croatian forces, were fully equipped with small arms. The reserve police force, numbering about 39,000 in April, was also transferred to reserve ZNG brigades and independent battalions. On 18 May the Zrinski Battalion was established as a special forces unit of the ZNG, its core consisting of 27 volunteers drawn from the Kumrovec SPU. Initially, it also relied on former French Foreign Legion troops. By July, the reserve force of 40,000 ZNG troops was assigned to 19 brigades and 14 independent battalions; however, they did not possess sufficient heavy or small arms for all their personnel. The Croatian police had approximately 15,000 small arms, with less than 30,000 additional weapons obtained from abroad by August.

On 28 May, the ZNG was presented to the public in a military parade at the Kranjčevićeva Street Stadium to boost morale. The parade featured approximately 800 soldiers, a dozen anti-aircraft systems, armoured cars and several armoured personnel carriers; the Presidential Guards and Alkars also participated.