Subject
- International relations47
- Colonial administration33
- First World War (1914-1918)29
- Treaties26
- Boundary disputes23
- Foreign policy17
- Armed forces16
- Diplomacy16
- Sovereignty14
- Loans13
- Mesopotamian Campaign (1914-1918)13
- Railways13
- Administration12
- Cars12
- Civil aviation11
- Foreign relations11
- Imperialism11
- Military occupation11
- Protectorates11
- River navigation11