with the 2nd Army ran just east of the Danube to Vukovar, then south towards Bijeljina. The boundary with the 6th Army ran just to the east of the Tisza to the confluence with the Danube, then south across the Sava through Obrenovac. The Yugoslav defence plan saw the 1st Army deployed with one division forward with an infantry detachment on each flank, and a cavalry division held in depth. The deployment of the 1st Army from west to east was: Infantry Detachment Sombor around Sombor 7th Infantry Division Potiska centred on Bačka Topola with its forward elements in Subotica Infantry Detachment Senta around Senta 3rd Cavalry Division south of the Danube in the Fruška Gora region between Novi Sad and Sremska Mitrovica The 44th Infantry Division Unska, which was under the direct command of the General Headquarters of the VKJ, was deployed in the 1st Army area to the east of the 3rd Cavalry Division, centred on Stara Pazova on the road between Novi Sad and Belgrade. Operations 6–10 April The 1st Army faced the Hungarian 3rd Army, and during the first few days after the commencement of the invasion, there were exchanges of fire with Hungarian border guards, but the 1st Army faced no direct attacks. Neither the 1st Army or the Hungarians were ready for full-scale fighting, as they were still mobilising and deploying their forces. On 9 April, due to events in other parts of Yugoslavia, the 6th Army on the right flank of the 1st Army was ordered to withdraw south of the Danube and deploy on a line facing east to defend against an attack from the direction of Sofia, Bulgaria. 2nd Army Group also received orders to withdraw south of the line of the Drava and Danube. 1st Army began to withdraw, and on the same day elements were approaching the Danube crossing. The following day, the situation deteriorated significantly when the German XLI Motorised Corps crossed the Yugoslav-Romanian border into the Yugoslav Banat and struck the 6th Army, halting its withdrawal and disrupting its ability to organise a coherent defence behind the Danube. Also on 10 April, the main thrust of the XLVI Motorised Corps of the 2nd Army, consisting of the 8th Panzer Division leading the 16th Motorised Infantry Division crossed the Drava at Barcs in the 4th Army sector. The 8th Panzer Division turned southeast between the Drava and Sava