Korne was engaged in follow-up operations in Crimea. Breaching the Isthmus of Perekop on 28 October 1941, his regiment moved towards Simferopol, cut the retreat roads to Yevpatoria, and then took part in the siege of Sevastopol and the Battle of the Kerch Peninsula. Korne's units fought at Feodosia and on the road to Kerch alongside the German troops of Colonel Karl-Albrecht von Groddeck. Starting in August 1942 Korne fought in the Battle of the Caucasus, reaching Anapa at the end of the month, and then Novorossiysk, which fell to Wehrmacht and Romanian Army units at the beginning of September. On 7 October, Korne took command of 8th Cavalry Division and engaged in the Battle of Stalingrad, as part of the 4th Romanian Army, under the command of lieutenant general Constantin Constantinescu-Claps. After the start of the Soviet offensive on 20 November, the division pulled back; its attempt to reach the encircled German 6th Army failed. The newly formed "Korne Detachment" (3rd, 4th Cavalry Regiments, 2nd Artillery Battalion, and the 7th Heavy Artillery Regiment), backed by German armored units, launched a counterattack towards Abganerovo; the action failed due to lack of effective anti-tank weapons. On 22 November, Korne's Detachment was attacked in the Krasnay-Geroy area, suffering heavy losses. On 26 November, the Korne and "Pannwitz" Detachments managed to push back the Soviet troops which had infiltrated between the Romanian formations. The next day, the Soviets broke through the lines of defense, and the general retreat started.