 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.