Subject
- First World War (1914-1918)92
- Diplomacy69
- Mesopotamian Campaign (1914-1918)31
- Frontiers30
- Treaties29
- Concessions27
- International relations26
- Arms traffic23
- Colonial administration22
- Rebellions21
- Bilateral relations19
- Boundaries18
- Expenditure18
- Railways18
- Loans17
- Armed forces16
- Imperialism16
- Military operations15
- Marine navigation14
- Military occupation14