General & world history 5 Military history 20th century history: c 1900 to c 2000 2 History 2 Middle Eastern history 2 African history 1 Archaeology 1 Asian history 1 Cultural studies 1 Economics 1 European history 1 Genocide & ethnic cleansing 1 History of religion 1 History of sport 1 History of the Americas 1 History: earliest times to present day 1 History: theory & methods 1 Local history 1 Oral history 1 Political ideologies 1 Political science & theory 1 Political structure & processes 1 Postwar 20th century history, from c 1945 to c 2000 1 Regional & national history 1 Second World War 1 Social & cultural history 1 The Holocaust 1