Reich was ordered to leave France and head for Romania, and the was ordered to Bulgaria. The , attached to the XL Panzer Corps, advanced west then south from Bulgaria into the mountains, and by 9 April had reached Prilep in Yugoslavia, 30 miles from the Greek border. Further north the Reich Division, with the XLI Panzer Corps, crossed the Romanian border and advanced on Belgrade, the Yugoslav capital. Fritz Klingenberg, a company commander in the Reich, led his men into Belgrade, where a small group in the vanguard accepted the surrender of the city on 13 April. A few days later the Royal Yugoslav Army surrendered.
