It inherited the traditions of the 11^th Army Connections Battalion constituted on 4^th July 1940 and destined to northern Africa where, with the name of 11^th Marconisti Battalion, it operated until the retreat in Tunis in 1942; after that it was dissolved.

Reconstituted on 5^th January 1943 for the 6^th Army in Sicily, it participated in the operations after the allied disembark on the isle where it was dissolved again in August 1943.

On 1^st March 1957 it was reconstituted in Rome at the Signals School and later dissolved in favour of the 9^th Signals Battalion on 1^st April 1959.

Reconstituted again on 1sr April 1972 in Bologna, after a new reorganization of the Army, it was located in Civitavecchia as 11^th "Leonessa" Signals Battalion. On 12^th November 1976 it received the War Flag.

Assigned to the Signals Command of the Military Central Region, in 1983 it passed at the dependencies of the Signals Inspectorate.

The Battalion acquired great operational capability and technical experience as signal component of the First Aid Force (Fo.P.I.), in favour of the Civil Protection based on "Acqui" Brigade, and Rapid Intervention Force (F.I.R) with military tasks. Since 1989 the "Leonessa" nucleus started to go around the world in order to support the contingents deployed overseas.

Firstly composed of only one battalion, the "Leonessa" has recently been flanked by the second "Tonale" Battalion. Now the Regiment is included in the Maneuvre Units of the Signals Command.