The deployment plan for 2nd Army Group saw the 1st Army in the Bačka region between the Danube and the Tisza, with formations centred around the towns of Sombor, Bačka Topola and Senta, with the 3rd Cavalry Division held in depth, south of the Danube in the Fruška Gora region. The 2nd Army deployment plan saw it in the Baranya and Slavonia regions between Slatina and the Danube, with its formations positioned south of the Drava from just east of Slatina to Valpovo, and around the towns of Osijek and Vinkovci. The Yugoslav historian Velimir Terzić notes that the army group headquarters and headquarters of both armies were still at their mobilisation centres on 6 April, and describes the mobilisation of all formations of the 1st Army Group on 6 April as only partial, with 80 to 90 percent of men having reported for duty and between 50 and 70 percent of its establishment strength in animals.