Subject
- First World War (1914-1918)35
- Diplomacy26
- Treaties20
- Bilateral relations17
- Mesopotamian Campaign (1914-1918)17
- Imperialism15
- Concessions14
- International relations14
- Boundaries11
- Loans11
- Arms traffic10
- Boundary disputes8
- Rebellions8
- Arms control7
- Concessions, red oxide, Abu Musa7
- Foreign relations7
- Frontiers7
- Mining7
- Postal services7
- Colonial administration6