Voronov worked on the supply, acquisition and coordination of artillery units in the areas of the Winter Campaign of 1941–42. In his report to Stalin of 28 February, Voronov raised the question of military air defence, which since November 1941 had remained without leadership. On 2 June, by order of the People's Commissariat for Defence, all air defence units were subordinated to the front artillery commanders and the chief of the artillery. In early June, Voronov took part in the planning and conducting of operations on the left flank of the Western Front. In July, he went to Stalingrad to assist the retreating 62nd Army and 64th Army. During the Moscow Conference, Shaposhnikov, Voroshilov and Voronov represented the Soviet Union during talks with the British military delegation. In September, Voronov accompanied Aleksandr Vasilevsky on a tour of the Southwestern Front, Stalingrad Front and Don Front. Voronov began to plan the artillery barrage in Operation Uranus. After the approval of the plan for Operation Uranus, Voronov worked with the chiefs of artillery of the fronts and supervised the training of units to conduct the offensive. During the beginning of the operation, Voronov was in the command post of the 21st Army. On 31 October, Voronov issued a decree on the establishment of artillery divisions in the Reserve of the Supreme High Command ("Stavka" Reserve). In late November, Voronov, Vasilevsky and Alexander Novikov visited the area of Operation Little Saturn.