The Battle of the Barracks was a series of engagements that occurred in mid-to-late 1991 between the Croatian National Guard and the Croatian police on one side and the Yugoslav People's Army (JNA) on the other. The battle took place around numerous JNA posts in Croatia, starting when Croatian forces blockaded the JNA barracks, weapons storage depots and other facilities. It formally began on 14 September; its objective was to neutralise the JNA positions in ZNG-held territory and to secure arms and ammunition supplies for the poorly equipped ZNG.

The Croatian National Guard 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.