| |
|
20th-century conflicts
|
123020 |
| |
|
Anti-communist terrorism
|
123022 |
| |
|
Illegal drug trade in Colombia
|
123023 |
| |
|
Communist rebellions
|
123024 |
| |
|
Otto Hahn
|
87035 |
| |
|
Victims of the Night of the Long Knives
|
123044 |
| |
|
Paramilitary organizations based in the United States
|
123049 |
| |
|
Herman Kahn
|
87043 |
| |
|
Destroyers sunk by aircraft
|
123064 |
| |
|
May Fourth Movement
|
86476 |