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Subject
- Military history, Modern23
- History11
- World politics5
- History, Modern3
- Violence3
- War3
- World War, 1914-19183
- Atrocities2
- Casualties2
- History, Military2
- Military art and science2
- Terrorism2
- World War, 1939-19452
- Aerial operations, American1
- Afghan War, 2001-20211
- Balance of power1
- Bombing, Aerial1
- Causes1
- Civilian war casualties1
- Conflict management1