Subject
- Plague29
- Trade routes29
- Air force28
- Arms control28
- Civil unrest28
- Landing grounds28
- Merchant shipping28
- Political information28
- Alliances27
- Ammunition27
- Concessions, Oil, Kuwait27
- Debt recovery27
- Intelligence27
- Legislation27
- Military aviation27
- Repatriation27
- Voyages and travels27
- Death26
- General Treaty with the Arab Tribes of the Persian Gulf (1820)26
- Medical personnel26