 LI Infantry Corps were tasked with attacking towards Maribor then driving towards Zagreb, while the XLIX Mountain Corps was to capture Dravograd then force a crossing on the Sava. At 05: 00 on 6 April, LI Infantry Corps captured the Drava bridges at Mureck and Radkersburg (opposite Gornji Radgona) undamaged. In the sector of the 38th Infantry Division Dravska, one German column pushed towards Maribor from Mureck, and the other pushed on from Gornja Radgona through Lenart towards Ptuj. Some time later, other elements of LI Infantry Corps attacked the area between Sveti Duh and Dravograd. The 7th and 8th Border Regiments met these attacks with fierce resistance, but were forced to withdraw due to German pressure. The 183rd Infantry Division captured 300 prisoners, and a bicycle-mounted detachment of the division reached Murska Sobota without striking any resistance. The 132nd Infantry Division also pushed south along the Sejanski valley towards Savci. By the end of the first day, LI Infantry Corps had occupied Gornja Radgona, Murska Sobota and Radenci, and had crossed the Drava near Sveti Duh. XLIX Mountain Corps captured border crossings on the approaches to Dravograd, but were held up by the 6th Border Regiment in mountain passes located further west at Ljubelj, Jezerski vrh and Korensko sedlo. Late that day, mountain pioneers destroyed some isolated Yugoslav bunkers in the area penetrated by Kampfgruppe Palten.
