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Italy Lost Million Dead After Choosing to Enter World War It Could Have Avoided

The Rest Is History · 672. The First World War: Italy’s Doomed Campaign (Part 2) · May 24, 2026
Italy Lost Million Dead After Choosing to Enter World War It Could Have Avoided
The Rest Is History
The Rest Is History
672. The First World War: Italy’s Doomed Campaign (Part 2)
"By the end of the war, the Italians have lost 689,000 people killed in battle, as well as probably about 600,000 civilians and another million Italians seriously wounded. And the thing is, for what? Because at the peace conferences, they are given Trieste, they're given Istria, they're given the Trentino and South Tyrol, but they're not given a lot of the other stuff they wanted."
Italy voluntarily entered World War I in May 1915 for territorial conquest despite having no defensive obligation, ultimately suffering catastrophic losses: nearly 700,000 military deaths, 600,000 civilian deaths, and a million wounded. Despite these sacrifices, Italy failed to secure many of its promised territorial gains at the peace conferences. This sense of betrayal and wasted sacrifice became a key factor in the rise of Italian fascism in the 1920s.

About this episode

In this episode of The Rest Is History, hosts Tom Holland and Dominic Sandbrook examine Italy's catastrophic entry into World War I in May 1915, a war the nation chose to join for territorial conquest despite having no defensive obligation. The episode opens with poet Gabriele D'Annunzio's bloodthirsty speech celebrating Italy's first casualties, setting the tone for a story of cynical politics and senseless slaughter. Prime Minister Antonio Salandra and Foreign Minister the Marquess of San Giuliano orchestrated Italy's betrayal of its alliance with Austria-Hungary, coining the infamous phrase 'sacred egoism' to justify abandoning the Triple Alliance. When parliament and the Italian people resisted war, D'Annunzio led a nationalist campaign in Rome featuring speeches that perverted Christian scripture to glorify bloodshed. His rhetoric, backed by crowds demanding war, intimidated King Victor Emmanuel III and parliament into submission. The episode details how Italy's subsequent campaign against Austria-Hungary on the Isonzo front became one of the war's greatest disasters. General Luigi Cadorna, wedded to an outdated doctrine of frontal assault, launched twelve battles over limestone mountains against Austrian defenders led by the capable Slavic general Svetozar Borojević. Italian troops carrying 35-kilogram backpacks charged uphill into machine gun fire in conditions worse than the Western Front, unable to dig proper trenches in limestone that sent deadly shards flying with each shell impact. The Austrians repeatedly ceased fire and begged Italian soldiers to retreat rather than die uselessly. By war's end, Italy had lost 689,000 killed in battle, 600,000 civilians, and a million wounded, yet failed to secure promised territorial gains. This sense of betrayal fed directly into the rise of fascism, with both D'Annunzio and Benito Mussolini channeling wartime resentment into authoritarian movements that would dominate Italy's future.

Key takeaways

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