Subject
- Diplomacy243
- Military operations85
- Military intelligence84
- Military administration72
- International relations62
- Military personnel60
- Reports56
- Bilateral relations52
- First World War (1914-1918)51
- Treaties50
- Frontiers47
- Railways44
- Trade (practice)42
- Slave trade30
- Military affairs29
- Military logistics29
- Colonial administration28
- Armed forces27
- Military supplies27
- Anglo-Persian War (1856-1857)24