After World War I the corps was moved once again to Bologna until it moved to Verona in 1927 and tasked with territorial and defence duties along the valley of the Adige. The corps consisted of the 9th Infantry Division "Pasubio" in Verona and the 11th Infantry Division "Brennero" in Bolzano. In 1935 the corps was moved to Bolzano, but quickly dispatched to reinforce the Italian troops that faced stiffer than expected resistance during the Italian invasion of Abyssinia. The corps commanded the 5th Infantry Division "Cosseria", 1st Blackshirt Division "23 March" and 5th Blackshirt Division "1° Febbraio". During the campaign in Abyssinia the IV Army Corps participated in the Battle of Shire.