<Tr> <Td> Union of African States </Td> <Td> 1961--1963 </Td> <Td> Mali, Ghana and Guinea . </Td> </Tr> <Tr> <Td> Federation of Arab Republics </Td> <Td> 1972 </Td> <Td> Egypt, Syria and Libya . </Td> </Tr> <Tr> <Td> Arab Islamic Republic </Td> <Td> </Td> <Td> Libya and Tunisia . </Td> </Tr> <Tr> <Td> Senegambia </Td> <Td> 1982--1989 </Td> <Td> Senegal and Gambia . </Td> </Tr>

What is the difference between a federal state and a confederate state