<Table> <Tr> <Th_colspan="2"> League of Nations Société des Nations (French) </Th> </Tr> <Tr> <Td_colspan="2"> Intergovernmental organisation </Td> </Tr> <Tr> <Td_colspan="2"> 1920--1946 </Td> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Td_colspan="2"> Anachronous World map showing member states of the League of Nations during its history . </Td> </Tr> <Tr> <Th> Status </Th> <Td> Intergovernmental organisation </Td> </Tr> <Tr> <Th> Capital </Th> <Td> Geneva, Switzerland </Td> </Tr> <Tr> <Th> Common languages </Th> <Td> French and English </Td> </Tr> <Tr> <Th> Secretary ‐ General </Th> <Td> </Td> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th> 1920--33 </Th> <Td> Sir Eric Drummond </Td> </Tr> <Tr> <Th> 1933--40 </Th> <Td> Joseph Avenol </Td> </Tr> <Tr> <Th> 1940--46 </Th> <Td> Seán Lester </Td> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th> Deputy Secretary - General </Th> <Td> </Td> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th> 1919--23 </Th> <Td> Jean Monnet </Td> </Tr> <Tr> <Th> 1923--33 </Th> <Td> Joseph Avenol </Td> </Tr> <Tr> <Th> 1937--40 </Th> <Td> Seán Lester </Td> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th> Treaty of Versailles </Th> <Td> 10 January 1920 </Td> </Tr> <Tr> <Th> First meeting </Th> <Td> 16 January 1920 </Td> </Tr> <Tr> <Th> Dissolved </Th> <Td> 20 April 1946 </Td> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Td_colspan="2"> <Table> <Tr> <Td> </Td> <Td> Succeeded by </Td> </Tr> <Tr> <Td> </Td> <Td> <Table> <Tr> <Td> United Nations </Td> <Td> </Td> </Tr> </Table> </Td> </Tr> </Table> </Td> </Tr> <Tr> <Td_colspan="2"> <Ol> <Li> ^ The headquarters were based from 1 November 1920 in the Palais Wilson in Geneva, Switzerland, and from 17 February 1936 in the purpose built Palace of Nations also in Geneva . </Li> </Ol> </Td> </Tr> </Table> <Tr> <Th_colspan="2"> League of Nations Société des Nations (French) </Th> </Tr>

When did the league of nations start and end
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