Background The Independent State of Croatia (NDH) was founded on 10 April 1941, during the invasion of Yugoslavia by the Axis powers. The NDH consisted of most of modern-day Croatia and Bosnia and Herzegovina, together with some parts of modern-day Serbia. It was essentially an Italo-German quasi-protectorate, as it owed its existence to the Axis powers, who maintained occupation forces within the puppet state throughout its existence. In the immediate aftermath of the Yugoslav surrender on 17 April, former Royal Yugoslav Army troops returned to their homes in eastern Herzegovina with their weapons. This was a significant security concern for the fledgling NDH government due to the proximity of the border with Montenegro, the close relationship between the people of eastern Herzegovina and Montenegro, and widespread banditry in the region. On the day after the surrender, the commander of the NDH armed forces, Vojskovođa (Marshal) Slavko Kvaternik issued a proclamation demanding the surrender of all weapons to NDH authorities by 24 April. On 24 April, the NDH created five military command areas, including Bosnia Command and Adriatic Command, both of which were initially headquartered in Sarajevo. Each of the five military commands included several district commands. Adriatic Command included the districts of Knin and Sinj in the Dalmatian hinterland, and Mostar and Trebinje in eastern Herzegovina. The NDH began to mobilise soldiers for the Home Guard, with six battalions identified to join Adriatic Command. The battalions were mobilised from areas outside of eastern Herzegovina, and were to be ready by 20 May. The aggressive actions of the Ustaše fifth column during the Axis invasion made Serb civilian leaders in eastern Herzegovina apprehensive about the NDH, and they attempted to obtain Italian protection, and urged the Italians to annex eastern Herzegovina to the neighboring Italian-occupied territory of Montenegro. A collaborationist "Interim Advisory Committee" of Montenegrin separatists was advocating the establishment of an "independent" Montenegrin state, and a similar committee of separatist Serbs was formed in eastern Herzegovina. A delegation from that committee arrived in Cetinje in Montenegro on 6 May to ask for Italian protection. Similarly, a delegation of Muslims from eastern Herzegovina travelled to Sarajevo, the historic Bosnian capital, to urge the NDH authorities to link eastern Herzegovina to that city. Due to the poor response to the demand for the surrender of weapons, the deadline was extended several times until a date of 8 July was fixed. On 17