<Table> <Tr> <Td_colspan="3"> Triple Alliance </Td> </Tr> <Tr> <Td_colspan="3"> <Ul> <Li> Dreibund </Li> <Li> Hármas szövetség </Li> <Li> Triplice alleanza </Li> <Li> Tripla Alianță </Li> </Ul> </Td> </Tr> <Tr> <Td_colspan="3"> Military alliance </Td> </Tr> <Tr> <Td_colspan="3"> <Table> <Tr> <Td> </Td> <Td> 1882--1915 </Td> <Td> </Td> </Tr> </Table> </Td> </Tr> <Tr> <Td_colspan="3"> The Triple Alliance in 1913 </Td> </Tr> <Tr> <Td_colspan="2"> Capital </Td> <Td> <Ul> <Li> none (de jure) </Li> <Li> Berlin (de facto) </Li> </Ul> </Td> </Tr> <Tr> <Td_colspan="2"> Political structure </Td> <Td> Military alliance </Td> </Tr> <Tr> <Td_colspan="2"> Historical era </Td> <Td> Belle Époque </Td> </Tr> <Tr> <Td> </Td> <Td> Dual Alliance (Germany / Austria - Hungary) </Td> <Td> 7 October 1879 </Td> </Tr> <Tr> <Td> </Td> <Td> Triple Alliance (Germany / Austria - Hungary / Italy) </Td> <Td> 20 May 1882 </Td> </Tr> <Tr> <Td> </Td> <Td> Romania secretly joins </Td> <Td> 18 October 1883 </Td> </Tr> <Tr> <Td> </Td> <Td> Italy leaves </Td> <Td> 3 May 1915 </Td> </Tr> <Tr> <Td_colspan="3"> <Table> <Tr> <Td> Preceded by </Td> <Td> Succeeded by </Td> </Tr> <Tr> <Td> <Table> <Tr> <Td> </Td> <Td> Dual Alliance (1879) </Td> </Tr> </Table> </Td> <Td> <Table> <Tr> <Td> Central powers </Td> <Td> </Td> </Tr> </Table> </Td> </Tr> </Table> </Td> </Tr> </Table> <Tr> <Td_colspan="3"> Triple Alliance </Td> </Tr>

When did italy drop out of the triple alliance