<Tr> <Td> Eighteenth Dynasty </Td> <Td> XVIII </Td> <Td> 1549--1292 </Td> </Tr> <Tr> <Td> Nineteenth Dynasty </Td> <Td> XIX </Td> <Td> 1292--1189 </Td> </Tr> <Tr> <Td> Twentieth Dynasty </Td> <Td> XX </Td> <Td> 1189--1077 </Td> </Tr> <Tr> <Td> Third Intermediate (show) <Table> <Tr> <Td> Twenty - first Dynasty </Td> <Td> XXI </Td> <Td> 1069--945 </Td> </Tr> <Tr> <Td> Twenty - second Dynasty </Td> <Td> XXII </Td> <Td> 945--720 </Td> </Tr> <Tr> <Td> Twenty - third Dynasty </Td> <Td> XXIII </Td> <Td> 837--728 </Td> </Tr> <Tr> <Td> Twenty - fourth Dynasty </Td> <Td> XXIV </Td> <Td> 732--720 </Td> </Tr> <Tr> <Td> Twenty - fifth Dynasty </Td> <Td> XXV </Td> <Td> 732--653 </Td> </Tr> </Table> </Td> </Tr>

Why were the hyksos important in egyptian history