Terrorism-related killings refer to fatalities that occur as a direct result of terrorist activities, including planned attacks, armed assaults, bombings, and other violent incidents perpetrated by individuals or groups with ideological, political, or religious motivations intended to intimidate populations or influence government policies. These fatalities are categorized based on the victims’ identities: civilians (ordinary citizens not directly involved in security operations), security forces (military, police, and other law enforcement personnel), and terrorists/insurgents/extremists themselves (individuals identified as perpetrators who may be killed during attacks or subsequent operations). Unlike conventional warfare casualties, terrorism-related killings often target non-combatants in public spaces, creating a psychological impact disproportionate to the actual number of casualties. These incidents are systematically documented by government agencies and research institutions to track patterns, assess threat levels, implement counterterrorism strategies, and understand the changing nature of extremist violence. The categorisation and counting of these fatalities can sometimes be complex due to definitional challenges about what constitutes terrorism versus other forms of political violence, insurgency, or criminal activity.