Timeline Sunday 23 May 1915

Events on Sunday 23 May 1915 2

• 1915 Italy enters World War I Italy declares war on Austria-Hungary, joining the Allies Italy declared war on Austria-Hungary on 23 May 1915, abandoning its prior alliance with the Central Powers under the secret Treaty of London. The declaration opened a new front along the Isonzo River that would see repeated costly Italian offensives.
• 1915 Italy enters the war Rome, Italy Italy abandoned the Triple Alliance and joined the Entente, promised Austrian territory in a secret treaty. It opened a front in the Alps that would cost 600,000 Italian lives.