Subject
- Slave trade17
- Slave emancipation12
- Bilateral relations8
- Second World War (1939-1945)8
- Petroleum industry7
- Homicide6
- Smuggling6
- Customs administration5
- Deportation5
- Piracy5
- Political reform5
- Armed forces4
- Arms control4
- Exports4
- First World War (1914-1918)4
- Legal procedure4
- Passports4
- Propaganda4
- Slavery4
- Trade (practice)4