After the announcement of the Armistice of Cassibile on 8 September 1943 the Italian government began the formation of units to fight on the allied side against Germany.

[1] On 13 October 1943 Italy declared war on Germany and the Italian government began with the formation of military units to fight on the allied side.

[2][3] On 18 April 1944 the I Motorized Grouping was expanded to division-size and renamed Italian Liberation Corps.

With the arrival of the 184th Infantry Division "Nembo" from Sardinia on 26 May 1944 did the Italian Liberation Corps reach corps-size.

[3][1] On 24 September 1944 the corps was disbanded its units and personnel used to form the combat groups "Folgore" and "Legnano".