War on TerrorUS-led international campaign against terrorist organizations, declared in response to the terrorist attacks on New York City and Washington, DC, on September 11th, 2001 that killed around 3,000 people. “Global War on Terror” is the term used to describe the military, political, diplomatic, and economic measures employed by the United States and other allied governments against organizations, countries, or individuals that are committing terrorist acts; that might be inclined to engage in terrorism; or that support those who do commit such acts.