In 1930, Voronov graduated from the academy. He became the commander of the artillery regiment of the 1st Moscow Rifle Division. In August 1932, Voronov was sent to Italy as part of the Soviet mission there. In April 1934, he was appointed chief military Commissar of the 1st Artillery School. In 1936, he was awarded the Order of the Red Star for his management of the school. In 1935, he served on the Soviet military mission to Italy for the second time, and was promoted to Kombrig on 11 November. In 1937, he was sent under the name "Voltaire" as an advisor to the Spanish Republicans, where he worked on the training of artillery units on the Madrid Front. During his tour in Spain, Voronov was awarded the Order of Lenin and the Order of the Red Banner. In June 1937, Voronov returned to Moscow.