The battalion was raised on 10 February 1915 with reservists of the Alpini Battalion "Tolmezzo" of the 8th Alpini Regiment. The battalion's name, like the names of all Alpini battalions raised during World War I with first line reservists, was the name of a valley near the active battalion's base; in the Val Tagliamento battalion's case the Tagliamento valley, which extends to the north from Tolmezzo. As with all Alpini battalions the recruits for the battalions were drafted exclusively from the area surrounding the battalions base. Initially the battalion fielded the 212th and 272nd Alpini companies, and received the 278th Alpini Company on 1 November 1916. The Val Tagliamento battalion's history is intertwined with the history of the 8th Alpini Regiment, with which it served during World War I. After having suffered heavy losses during the Battle of Caporetto and the following retreat to the Piave the battalion was disbanded on 15 February 1918. For its conduct during the war the battalion was awarded a Silver Medal of Military Valour.
On 1 July 1963 the XV Alpini Fortification Battalion in Stazione Carnia was renamed Alpini Battalion "Val Tagliamento". The battalion was part of the 11th Alpini Fortification Grouping of the Alpine Brigade "Julia" and tasked with tasked to man fortifications in the upper Canale valley, which the Italian Army assumed to be one of two main directions of a possible Warsaw Pact advance. Initially the Val Tagliamento fielded six companies, but 30 June 1964 a further three companies arrived from the disbanded Alpini Battalion "Val Natisone". During the 1975 army reform the 11th Alpini Fortification Grouping was disbanded on 1 June 1975, as was the Val Tagliamento's sister battalion "Val Fella", whose six companies were transferred to the Val Tagliamento. After the reform the Val Tagliamento received the war flag and traditions of the 11th Alpini Fortification Grouping, moved its headquarters to Tolmezzo, and fielded 16 Alpini companies for an organic strength of over 2,500 men, making it by far the largest battalion in the Italian Army. Below all companies of the battalion are listed with the Nappina color denoting to which battalion a company was originally assigned: = Val Tagliamento = Val Fella = Val Natisone
Alpini Battalion "Val Tagliamento", in Tolmezzo
* Command and Services Company, in Tolmezzo
* 212th Alpini Company
* 216th Alpini Company
* 220th Alpini Company
* 269th Alpini Company
* 270th Alpini Company
* 271st Alpini Company
* 272nd Alpini Company
* 273rd Alpini Company
* 278th Alpini Company
* 288th Alpini Company
* 306th Alpini Company
* 307th Alpini Company
* 308th Alpini Company
* 312th Alpini Company
* 313th Alpini Company
* 314th Alpini Company
Type A = fortification fully equipped, provisioned and manned; close support platoon on site
Type B = fortification fully equipped, provisioned and manned; close support platoon off site
Type C = fortification fully equipped; provisions, crew and close support platoon off site
For its conduct and work after the 1976 Friuli earthquake the battalion was awarded a Bronze Medal of Army Valour, which was affixed to the battalion's war flag and added to the battalion's coat of arms. The fortifications the Val Tagliamento would man in case of war with the Warsaw Pact had been build as Alpine Wall in the early stages of World War II and as fixed fortifications became obsolete the battalion was steadily reduced in the second half of the 1980s consisted of the following companies:
* 308th Fortifications Maintenance and Surveillance Company, in Pontebba
On 26 September 1992 the battalion was disbanded its war flag was transferred to the shrine of the flags at the Vittoriano in Rome.
War flag and coat of arms
Three of the medals affixed to the Val Tagliamento's war flag and displayed on the battalion's coat of arms had actually been awarded to the Val Natisone battalion, respectively the Val Fella battalion, but when the two battalions were merged into the Val Tagliamento their decorations and traditions were added to the Val Tagliamento's.