Subject
- Merchant shipping18
- Oil extraction18
- Political information18
- Transport infrastructure18
- Water supply18
- Airlines17
- Cholera17
- Colonial policy17
- Debts17
- Plague17
- Postal services17
- Raids (Military science)17
- Surveys17
- War (concept)17
- Arab Revolt (1916-1918)16
- Battles16
- Building construction16
- Insurrections16
- Jurisdiction16
- Lighthouses16