When Austro-Hungary declared war on Serbia on 28 July 1914, the First World War began and Europe became an enormous battlefield. It was divided into several fronts, because the two opposing blocks both entered the war. The Central Powers, i.e. Germany, Austro-Hungary, Bulgaria and Turkey on one side, and the Allies, France, Great Britain and Russia on the other. In spite of the tripartite alliance with Austro-Hungary and Germany, Italy remained neutral in the first year of the war. After the London Pact between Italy and the Allies was signed, Italy resigned from the tripartite alliance and declared war on Austro-Hungary on 23 May 1915. On this, the south-west front was opened, six-hundred-kilometers long; it ran from the pass of Stelvio at the contact point of Swiss, Italian and Austrian borders, across Tyrol, the Carnian Alps, and the Soča/Isonzo region to the Adriatic Sea. The ninety-kilometer section of the front running along the Soča from Mt. Rombon to the Adriatic was called the Isonzo Front. The warfare lasted for twenty-nine months in this area and twelve offensives took place during this time. Eleven of them were launched by the Italians, and the twelfth by the joined Austro-Hungarian and German armies.

The First Isonzo battle (23 June - 7 July 1915)
The Second Isonzo battle (18 July - 3 August 1915)
The Third Isonzo battle (18 October - 4 November 1915)
The Fourth Isonzo battle (10 November - 2 December 1915)
The Fifth Isonzo battle (11-16 March 1916)
The Sixth Isonzo battle (4-16 August 1916)
The Seventh Isonzo battle (13-17 September 1916)
The Eighth Isonzo battle (9-12 October 1916)
The Ninth Isonzo battle (31 October - 4 November 1916)
The Tenth Isonzo battle (12 May - 5 June 1917)
The Eleventh Isonzo battle (17 August - 12 September 1917)
The Twelfth Isonzo battle (24-28 October / 9 November 1917)

The warfare along the Soča ended with the 12th Isonzo battle, which began on 24 October 1917, and resulted in the Austro-Hungarian-German advance towards the Italian inland where the front was stabilized on the Piave river on 9 November 1917. After a year of battles with the Italian army on that front, the Austro-Hungarian monarchy collapsed. The First World War ended with the German surrender on 11 November 1918.

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