Subject
- Bolshevism9
- Military strategy9
- Biographies8
- First World War (1914-1918)8
- Geographical data8
- Mesopotamian Campaign (1914-1918)8
- Military deployment8
- Political intelligence8
- Surveys8
- Administration7
- Food supply7
- Imperialism7
- Roads7
- War casualties7
- Armed forces6
- Hydrology6
- Irrigation6
- Telegraph lines6
- Aeroplanes5
- Malleson Mission (1918-1919)5