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First Battle of the Isonzo
Part of the Italian Front
(World War I)
Italian Front 1915-1917.jpg
Eleven Battles of the Isonzo
June 1915 — September 1917
Date June 23—July 7, 1915
Location Isonzo river, north-west Slovenia from the Monte Nero to the Gulf of Trieste
Result Italian victory
Italy Italy  Austria-Hungary
Luigi Cadorna,
Emanuele Filiberto
General Frugoni
General Svetozar Boroević
Major General Géza Lukachich von Somorja
Major GeneralNovak von Arienti
225,000 (18 divisions, 252 battalions, 111 cavalry squadrons, 700 guns) 115,000 (8 divisions, 84 battalions, 13 cavalry squadrons, 356 guns)
Casualties and losses
14,947 9,950

The First Battle of the Isonzo was fought between the Armies of Italy and Austria-Hungary on the Italian Front in World War I, between June 23 and July 7, 1915.

The aim of the Italian Army was to drive the Austrians away from its defensive positions along the Isonzo River and on the nearby mountains.

Although the Italians enjoyed a 2:1 numeric superiority, their offensive failed because the Italian commander, Luigi Cadorna, employed frontal assaults after impressive (but short) artillery barrages. The Austrians had the advantage of fighting from uphill positions barricaded with barbed wire which were able to easily resist the Italian assault.

The heaviest fighting occurred around Gorizia where Italian troops were able to advance as far as the suburbs, only to be later repelled.

Early in July the Austrian commander, Svetozar Boroević, received two reinforcement divisions, which put an end to the Italian efforts at breaking through the Austrian lines.

The final Italian gains were minimal: in the northern sector, they conquered the heights over Bovec (Mount Kanin); in the southern sector, they conquered the westernmost ridges of the Kras plateau near Fogliano Redipuglia and Monfalcone.


Involved units

5th Army
VII Corps XVI Corps XV Corps
1st Infantry Division 57th Infantry Division 61st Infantry Division 20th Infantry Division 58th Infantry Division
17th Infantry Division 18th Infantry Division 50th Infantry Division
187th Infantry Brigade 6th Mountain Brigade 16th Mountain Brigade 14th Mountain Brigade 81st Honvéd Infantry Brigade
39th Honvéd Infantry Brigade 2nd Mountain Brigade 12th Mountain Brigade 5th Mountain Brigade 4th Mountain Brigade
10th Mountain Brigade 1st Mountain Brigade 13th Mountain Brigade 7th Mountain Brigade 15th Mountain Brigade
8th Mountain Brigade 3rd Mountain Brigade
93rd Infantry Division
VII Corps in Kostanjevica XVI Corps in Dornberg XV Corps in Kneža
2nd Army 3rd Army
VII Corps X Corps XI Corps VI Corps II Corps
IV Corps
13th Infantry Division 14th Infantry Division 20th Infantry Division 19th Infantry Division 21st Infantry Division
12th Infantry Division 11th Infantry Division 4th Infantry Division 3rd Infantry Division 32nd Infantry Division
7th Infantry Division 8th Infantry Division Bersaglieri Division Alpini Group A and B half 29th Infantry Division
XIV Corps
half 29th Infantry Division 22nd Infantry Division 28th Infantry Division 30th Infantry Division 23rd Infantry Division
27th Infantry Division 33rd Infantry Division 1st Cavalry Division 2nd Cavalry Division 3rd Cavalry Division
2nd Army in Udine 3rd Army in Cervigano

See also

Gorizia (left) and the Isonzo
Austro-Hungarian trench at the Isonzo


  • Österreichisches Staatsarchiv/Kriegsarchiv Wien
  • L'esercito italiano nella grande guerra (1915–1918) Volume I - IV / Roma: Ministerio della Guerra - Ufficio Storico, 1929–1974
  • Ministero della Guerra Stato Maggiore centrale - Ufficio Storico. Guerra Italo-Austriaca 1915-18. Le medaglie d'Oro. Volume secondo - 1916. Roma: 1923
  • Österreich-Ungarns letzter Krieg 1914-1918 Band II Verlag der Militärwissenschftlichen Mitteilungen Wien 1931-1933
  • Anton Graf Bossi-Fedrigotti: Kaiserjäger - Ruhm und Ende. Stocker Verlag, Graz 1977

Further reading

External links



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