Subject
- World politics27
- Great Britain. Royal Air Force25
- Canada. Royal Canadian Navy24
- Operation Overlord24
- Korean War (1950-1953)22
- Indigenous peoples16
- Turkish Invasion of Cyprus (Cyprus : 1974)16
- United States. Air Force16
- Naval history15
- Persian Gulf War (1991)13
- Race discrimination13
- Tanks (Military science)13
- Afghan War (2001-2021)11
- Afghan Wars11
- Criminal justice, Administration of11
- Indians, Treatment of11
- Discrimination in criminal justice administration10
- San Juan Boundary Dispute (1846-1872)10
- Coast defenses9
- Cuban Missile Crisis (1962)9