The unit was formed in 1972 as a battalion and given the number XI, which had been used by two signal battalions during World War II: one of which, had served in the Western Desert campaign and Tunisian campaign; while the other had served during the Allied invasion of Sicily.

The reformed battalion was assigned to the Army General Staff's Signal Inspectorate.

In 1975, the battalion was named for the Sella di Leonessa Pass and received its own flag.

In 1992, the battalion lost its autonomy and entered the newly formed 11th Signal Regiment.

The battalion was assigned to the 12th Engineer Regiment in Palermo, which provided the remaining personnel.

In October 1942, at the eve of the Second Battle of El Alamein, the battalion consisted of the 110th, 120th, and 127th Marconisti companies.

During the night of 9 to 10 July 1943, allied forces landed in Sicily and the battalion, which was assigned to the 9th Engineer Grouping, operated in the area of Enna.

[5] On 12 November 1976, the President of the Italian Republic Giovanni Leone granted with decree 846 the battalion a flag.