<Tr> <Td> <Ul> <Li> Stone Age </Li> <Li> Bronze and Iron Age </Li> <Li> Antiquity </Li> <Li> Polish tribes </Li> </Ul> </Td> </Tr> <Ul> <Li> Stone Age </Li> <Li> Bronze and Iron Age </Li> <Li> Antiquity </Li> <Li> Polish tribes </Li> </Ul> <Li> Bronze and Iron Age </Li> <Tr> <Th> Middle Ages </Th> </Tr>

What was going on in poland during ww2