claim: Cleopatre is by Massenet and it is significant.
evidence: The Bosnian crisis of 1908 -- 09 , also known as the Annexation crisis or the First Balkan Crisis , erupted when on 8 October 1908 , Austria-Hungary announced the annexation of Bosnia and Herzegovina , territories formally within the sovereignty of the Ottoman Empire .. Austria-Hungary. Austria-Hungary. annexation. annexation. Bosnia and Herzegovina. Bosnia and Herzegovina in Austria-Hungary. Ottoman Empire. Ottoman Empire. This unilateral action -- timed to coincide with Bulgaria 's declaration of independence -LRB- 5 October -RRB- from the Ottoman Empire -- sparked protestations from all the Great Powers and Austria-Hungary 's Balkan neighbours , Serbia and Montenegro .. Austria-Hungary. Austria-Hungary. Ottoman Empire. Ottoman Empire. Great Powers. Great Powers. Serbia. Serbia. Montenegro. Montenegro. In April 1909 the Treaty of Berlin was amended to reflect the fait accompli and bring the crisis to an end .. Treaty of Berlin. Treaty of Berlin ( 1878 ). The crisis permanently damaged relations between Austria-Hungary on one hand and Serbia , Italy and the Russian Empire on the other .. Austria-Hungary. Austria-Hungary. Serbia. Serbia. Russian Empire. Russian Empire. The Italian historian Luigi Albertini regarded it as laying the grounds for World War I. Although the crisis ended with what appeared to be a total Austro-Hungarian diplomatic victory , Russia became determined not to back down again and hastened its military build-up .. Luigi Albertini. Luigi Albertini. World War I. World War I. Austrian -- Serbian relations became permanently stressed .