On 10 June 1940, the XIV Corps was deployed in eastern Veneto with headquarters in Treviso; it was composed of the "Marche" and "Puglie" Divisions and didn't take part in any war operations.
In February 1941, the Corps received the order to move to Albania and it participated in the Invasion of Yugoslavia.
In July 1941, following the deterioration of the situation in Montenegro due to the presence of strong guerrilla formations, the Army Corps was transferred to this region as an occupation force.
To carry out this new task, it was considerably strengthened and included the "Messina", "Venice", "Taro", "Pusteria" and "Cacciatori delle Alpi" divisions as well as the I and II Valle Alpini Group.
For the rest of the war, XIV Corps, still subjected to intense partisan activity, remained in the Italian governorate of Montenegro, organized the coastal defense of southern Yugoslavia and carried out frequent anti-guerrilla operations.