<Table> <Tr> <Td> Prehistoric Britain </Td> <Td> until c. 43 </Td> </Tr> <Tr> <Td> Roman Britain </Td> <Td> c. 43--410 </Td> </Tr> <Tr> <Td> Anglo - Saxon </Td> <Td> c. 500--1066 </Td> </Tr> <Tr> <Td> Norman </Td> <Td> 1066--1154 </Td> </Tr> <Tr> <Td> Plantagenet </Td> <Td> 1154--1485 </Td> </Tr> <Tr> <Td> Tudor </Td> <Td> 1485--1603 </Td> </Tr> <Tr> <Th> Elizabethan </Th> <Td> 1558--1603 </Td> </Tr> <Tr> <Td> Stuart </Td> <Td> 1603--1714 </Td> </Tr> <Tr> <Th> Jacobean </Th> <Td> 1603--1625 </Td> </Tr> <Tr> <Th> Caroline </Th> <Td> 1625--1649 </Td> </Tr> <Tr> <Th> (Interregnum) </Th> <Td> 1649--1660 </Td> </Tr> <Tr> <Th> Restoration </Th> <Td> 1660--1714 </Td> </Tr> <Tr> <Td> Georgian </Td> <Td> 1714--1837 </Td> </Tr> <Tr> <Th> Regency </Th> <Td> 1811--1820 </Td> </Tr> <Tr> <Td> Victorian </Td> <Td> 1837--1901 </Td> </Tr> <Tr> <Td> Edwardian </Td> <Td> 1901--1914 </Td> </Tr> <Tr> <Td> First World War </Td> <Td> 1914--1918 </Td> </Tr> <Tr> <Td> Interwar Britain </Td> <Td> 1919--1939 </Td> </Tr> <Tr> <Td> Second World War </Td> <Td> 1939--1945 </Td> </Tr> </Table> <Tr> <Td> Prehistoric Britain </Td> <Td> until c. 43 </Td> </Tr> <Tr> <Td> Roman Britain </Td> <Td> c. 43--410 </Td> </Tr> <Tr> <Td> Anglo - Saxon </Td> <Td> c. 500--1066 </Td> </Tr>

What was britain's role in world war 1