Subject
- First World War (1914-1918)13
- Kings and rulers--Succession13
- Military occupation13
- Political intelligence13
- Surveys13
- Telegraph lines13
- Financial administration12
- International relations12
- Naval affairs12
- Railways12
- Roads12
- Subsidies12
- War (concept)12
- Frontiers11
- Personnel11
- Propaganda11
- Arms traffic10
- Customs duty10
- Historic cities10
- Smuggling10