The XVIII Army Corps was created during World War I on 7 June 1916 and dissolved on 5 September 1919.
Renamed XVIII Army Corps on 1 April 1940, it was disbanded again on 25 July 1940.
On 1 July 1941, the XVIII Corps was formed again in Bolzano, and was moved to Split on 3 February 1942, where it took control over the Governorate of Dalmatia.
Its task was to defend the coast and units of the Army Corps were also continuously engaged in actions against Yugoslav partisan formations.
XVIII Army Corps was disarmed by the Germans and dissolved in Venice on 19 September 1943, after the Armistice of Cassibile.