<Tr> <Td> A 37 mm automatic air defense gun M1939 used by the Viet Minh during the battle . </Td> </Tr> <Table> <Tr> <Td> </Td> </Tr> <Tr> <Td> Captured French artillery at the Dien Bien Phu Museum </Td> </Tr> </Table> <Tr> <Td> Captured French artillery at the Dien Bien Phu Museum </Td> </Tr> <Table> <Tr> <Td> </Td> </Tr> <Tr> <Td> Explosive crater at the top of Eliane 2 </Td> </Tr> </Table>

According to the lesson why did france suffer the most as a result of world war i