Subject
- Military personnel30
- Bilateral relations27
- Military administration27
- Slave trade26
- Second World War (1939-1945)23
- Astronomy--Early works to 180022
- Colonial administration18
- Foreign relations18
- Military affairs18
- Political affairs18
- Astrology--Early works to 180016
- Military operations16
- Military intelligence14
- Petroleum industry14
- Reports13
- Trade (practice)13
- Medicine--Early works to 180012
- Customs administration11
- Slave emancipation11
- Smuggling10