23 mai 1915 - Italy declares war on Austria-Hungary
Description:
 - although was Germany, Austria-Hungary, and 
  Italy formed the Triple Alliance in the 1800's, 
  Italy declared herself neutral when WWI 
  started
- Italy later signed the Treaty of London on April 
  26, 1915, allying herself with the Allies
- she declared war on Austria-Hungary but not 
  Germany, 
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