Subject
- Telegraph lines8
- Military operations4
- Arms traffic3
- Bilateral agreements3
- Sovereignty3
- Subsidies3
- Concessions2
- Frontiers2
- Geographical exploration2
- Naval operations2
- Security of property2
- Arms control1
- Baloch people1
- Blockades1
- Boundary disputes1
- First World War (1914-1918)1
- Kings and rulers--Succession1
- Maps1
- Railway lines1
- Slave emancipation1