Subject
- First World War (1914-1918)41
- Diplomacy26
- International relations22
- Mesopotamian Campaign (1914-1918)16
- Loans13
- Armed forces12
- Bilateral relations11
- Frontiers8
- Financial administration7
- Imperialism7
- Military intelligence7
- Oilfields7
- Treaties7
- Expenditure6
- State visits6
- Trade (practice)6
- Consular services5
- Embassies and consulates5
- Military affairs5
- Postal services5