<Tr> <Th> Former political entities </Th> </Tr> <Tr> <Td> <Ul> <Li> Denmark--Norway </Li> <Li> Sweden--Finland </Li> <Li> Sweden - Norway </Li> <Li> Kalmar Union </Li> </Ul> </Td> </Tr> <Ul> <Li> Denmark--Norway </Li> <Li> Sweden--Finland </Li> <Li> Sweden - Norway </Li> <Li> Kalmar Union </Li> </Ul> <Li> Denmark--Norway </Li>

Who are the vikings and where did they come from