Subject
- Military intelligence70
- Military administration68
- International relations57
- Military personnel56
- Diplomacy54
- Reports50
- First World War (1914-1918)49
- Railways42
- Military operations41
- Trade (practice)29
- Colonial administration28
- Military logistics28
- Bilateral relations27
- Military supplies27
- Frontiers26
- Military affairs25
- Armed forces24
- Foreign relations21
- Loans21
- Roads20