On 10 January 1943, after an artillery barrage, Operation Koltso was launched. For the operation, Voronov was awarded the Order of Suvorov 1st class. On 18 January, he was promoted to Marshal of the Artillery. On 31 January, Friedrich Paulus surrendered to Soviet troops and Voronov personally interrogated him. In early February, Voronov was sent to the Northwestern Front to assist with the planning and operation of the Demyansk Offensive. In April, the Katyusha rocket launcher units were handed over to the chief of the artillery, but self-propelled artillery units were placed under command of tank units, despite Voronov's protests. From May to June, Voronov oversaw the formation of the first five breakthrough artillery corps, and on 5 July served as the representative for the commander of the Bryansk Front, as well as checking the preparation of the artillery bombardment in the Battle of Kursk. On 3 August, he was sent to the Western Front to monitor the planning and conduct of the Battle of Smolensk.