<Ul> <Li> Prehistoric </Li> <Li> Ancient </Li> <Li> Post-classical </Li> </Ul> <Ul> <Li> Early Modern </Li> </Ul> <Ul> <Li> Late Modern <Ul> <Li> Industrial </Li> <Li> Fourth - Gen </Li> </Ul> </Li> </Ul> <Li> Late Modern <Ul> <Li> Industrial </Li> <Li> Fourth - Gen </Li> </Ul> </Li>

What do you understand by the term cold war