Domestic terrorism or homegrown terrorism is a form of terrorism in which victims "within a country are targeted by a perpetrator with the same citizenship" as the victims. There are various different definitions of terrorism, with no universal agreement about it.
Aftermath of the Oklahoma City bombing, the deadliest domestic terrorist attack in United States history
Ulrike Meinhof of the Red Army Faction
Damage to building after 2010 Austin suicide attack
Terrorism, in its broadest sense, is the use of violence against non-combatants to achieve political or ideological aims. The term is used in this regard primarily to refer to intentional violence during peacetime or in the context of war against non-combatants. There are various different definitions of terrorism, with no universal agreement about it. Different definitions of terrorism emphasize its randomness, its aim to instill fear, and its broader impact beyond its immediate victims.
United Airlines Flight 175 hits the South Tower of the World Trade Center during the September 11 attacks of 2001 in New York City, an act of terrorism planned by Osama bin Laden and executed by Al-Qaeda.
Seal of the Jacobin Club
Number of failed, foiled or successful terrorist attacks by year and type within the European Union. Source: Europol.
Aftermath of the King David Hotel bombing by the Zionist militant group Irgun, July 1946