<Tr> <Td> Aksum </Td> <Td> to 10th century AD </Td> </Tr> <Tr> <Td> Middle Ages (show) <Table> <Tr> <Td> Prehistory </Td> <Td> </Td> </Tr> <Tr> <Td> Antiquity </Td> <Td> to 1st century BC </Td> </Tr> <Tr> <Td> Aksum </Td> <Td> to 10th century AD </Td> </Tr> <Tr> <Td> Zagwe dynasty </Td> <Td> to 1268 </Td> </Tr> <Tr> <Td> Early Solomonic period </Td> <Td> 1270--1529 </Td> </Tr> </Table> </Td> </Tr> <Table> <Tr> <Td> Prehistory </Td> <Td> </Td> </Tr> <Tr> <Td> Antiquity </Td> <Td> to 1st century BC </Td> </Tr> <Tr> <Td> Aksum </Td> <Td> to 10th century AD </Td> </Tr> <Tr> <Td> Zagwe dynasty </Td> <Td> to 1268 </Td> </Tr> <Tr> <Td> Early Solomonic period </Td> <Td> 1270--1529 </Td> </Tr> </Table> <Tr> <Td> Prehistory </Td> <Td> </Td> </Tr>

What factors led to the fall of aksum