<Tr> <Td> June 4 </Td> <Td> Treaty of Trianon between the Allies and Hungary . </Td> <Td> Details </Td> </Tr> <Tr> <Td> August 10 </Td> <Td> Treaty of Sèvres between the Allies and the Ottoman Empire . The treaty is not recognized by the Turkish national movement, which considers the Istanbul government illegitimate . </Td> <Td> Details </Td> </Tr> <Tr> <Td> September 8 </Td> <Td> Gabriele D'Annunzio proclaims in Fiume the Italian Regency of Carnaro . </Td> <Td> Details </Td> </Tr> <Tr> <Td> November 1 </Td> <Td> League of Nations headquarters moved to Geneva, Switzerland . </Td> <Td> Details </Td> </Tr>

How did austria declaring war on serbia start ww1