For the rest of the war the corps fought on the Isonzo front. In the twelfth battle of the Isonzo the corps was covering the northern flank of the Italian 2nd Army between Mount Rombon and Dolje. The main Austro-German attack was aimed at the Italian IV and XXVII Corps. The Italian defences were quickly overcome and the rapid advance cut the IV Corps' line of retreat. Most of the men and material of the IV Corps were captured by the Central Powers troops and the corps was not raised again until the end of the war.