|Pages in this category should be moved to subcategories where applicable. This category may require frequent maintenance to avoid becoming too large. It should directly contain very few, if any, pages and should mainly contain subcategories.|
This category has the following 15 subcategories, out of 15 total.
- ► 20th-century murder (119 C, 1 P)
- ► Terrorist incidents in the 20th century (10 C)