Subject
- International relations45
- Colonial administration32
- Treaties23
- First World War (1914-1918)20
- Mesopotamian Campaign (1914-1918)13
- Slave trade13
- Sovereignty13
- Administration11
- Cars11
- Civil aviation11
- Protectorates11
- Armed forces10
- Foreign relations10
- Military occupation10
- Foreign policy9
- Boundary disputes8
- Diplomacy8
- Imperialism8
- Political information8
- River navigation8