With the signing of the secret Treaty of London in 1915, which was the condition for Italy’s entry into the First World War on the side of the Triple Entente, Italy assured itself the territory of the hitherto Austrian Küstenland or Litorale, including present-day Primorska and Istria. In November 1918 the Italian army occupied these areas. Until mid-1919 the Julian March (Italian: Venezia Giulia), as the newly annexed territory was known, was administered by a military government based in Trieste, after which a general civil commission was established in the occupied territory. Following the signing of the Treaty of Rapallo between Italy and the Kingdom of Serbs, Croats and Slovenes in November 1920, the territory was definitively annexed to Italy along with a population of 600,000 Slovenes and Croats.







