Subject
- Colonial administration16
- Expenditure14
- Military affairs12
- Slave trade12
- Transport infrastructure12
- Foreign affairs10
- Land10
- Boundary disputes9
- Frontiers9
- Internal politics9
- Treaties7
- Boundaries6
- Diplomacy6
- Protectorates6
- Military operations4
- Arms control3
- Famines3
- Financial administration3
- Imperialism3
- International relations3