- This article is about the prevention of flight in a region of airspace by the application or threat of military power. For information on prevention of flight ordinarily enforced by civil regulation or legal means, see Prohibited airspace.
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A no-fly zone (or no-flight zone) is a territory or an area over which aircraft are not permitted to fly. Such zones are usually set up in a military context, somewhat like a demilitarized zone in the sky, and usually prohibit military aircraft of a belligerent nation from operating in the region.
Past no-fly zones 
Iraq, 1991–2003 
In 1991, the United States, United Kingdom, France, Turkey, and other states intervened in Kurdish-Iraqi dispute in northern Iraq by establishing a no-fly zone in which Iraqi aircraft were prevented from flying. The intent of the no-fly zone was to prevent possible bombing and chemical attacks against the Kurdish people by the Iraqi regime. The initial operations were dubbed Operation Provide Comfort and Operation Provide Comfort II and were followed by Operation Northern Watch. While the enforcing powers had cited United Nations Security Council Resolution 688 as authorising the operations, the resolution contains no explicit authorization. The Secretary-General of the UN at the time the resolution was passed, Boutros Boutros-Ghali called the no-fly zones "illegal" in a February 2003 interview with John Pilger. In southern Iraq, Operation Southern Watch was established in 1992 to protect Iraq's Shia population. It originally extended to the 32nd parallel but was extended to the 33rd parallel in 1996.
Bosnia and Herzegovina, 1993–1995 
In 1992, the United Nations Security Council passed United Nations Security Council Resolution 781, prohibiting unauthorized military flights in Bosnian airspace. This led to Operation Sky Monitor, where NATO monitored violations of the no-fly zone but did not take action against violators of the resolution. In response to 500 documented violations by 1993, including one combat violation, the Security Council passed Resolution 816, which prohibited all unauthorized flights and allowed all UN member states to "take all necessary measures...to ensure compliance with [the no-fly zone restrictions]." This led to Operation Deny Flight. NATO later launched air strikes during Operation Deny Flight and during Operation Deliberate Force.
Lessons from Iraq and Bosnia 
A 2004 Stanford University paper published in The Journal of Strategic Studies, "Lessons from Iraq and Bosnia on the Theory and Practice of No-fly Zones," reviewed the effectiveness of the air-based campaigns in achieving military objectives. The paper's findings were: 1) A clear, unified command structure is essential. In Bosnia, during "Operation Deny Flight," a confusing dual-key coordination structure provided inadequate authority and resulted in air forces not being given authority to assist in key situations; 2) To avoid a "perpetual patrol problem," states must know in advance their policy objectives and the exit strategy for no-fly zones; 3) The effectiveness of no-fly zones is highly dependent on regional support. A lack of support from Turkey for the 1996 Iraq no-fly zone ultimately constrained the coalition's ability to effectively enforce it.
Libya 2011 
- In response to violence by the government of Muammar Gaddafi during the 2011 Libyan civil war, the United Nations Security Council approved a no-fly zone on 17 March 2011. The resolution includes provisions for further actions to prevent attacks on civilian targets. The NATO no fly zone was terminated on 27 October after a unanimous vote by the UNSC.
See also 
- Pilger, John (February 23, 2003). "A People Betrayed". ZNet. Retrieved March 5, 2011.
- Pilger, John (August 7, 2000). "Labour Claims Its Actions Are Lawful While It Bombs Iraq, Strarves Its People and Sells Arms To Corrupt States". johnpilger.com. Retrieved March 5, 2011.
- Staff writer (December 29, 1998). "Containment: The Iraqi No-Fly Zones". BBC News. Retrieved March 5, 2011.
- [dead link] 2nd Cruise Missile Strikes in Iraq
- Beale, Michael (1997). Bombs over Bosnia – The Role of Airpower in Bosnia-Herzegovina. Air University Press (Maxwell Air Force Base, Montgomery, Alabama). p. 19. OCLC 444093978.
- Lewis, Paul (March 19, 1993). "U.N. Moving To Toughen Yugoslav Flight Ban". The New York Times. Retrieved March 5, 2011.
- Resolution (March 31, 1993). "Resolution 816 (1993) – Adopted by the Security Council at Its 3191st Meeting, on 31 March 1993". United Nations Security Council (via The UN Refugee Agency). Retrieved March 9, 2011.
- "Lessons from Iraq and Bosnia on the Theory and Practice of No-fly Zones". Journalist's Resource.org.
- Bilefsky, Dan; Landler, Mark (March 17, 2011). "U.N. Approves Airstrikes to Halt Attacks by Qaddafi Forces". The New York Times.
- Bass, Frank; Solomon, John (April 5, 2002). "Prohibited Flights Not Unusual – Preventing Terrorism on Capital Poses Challenge". Associated Press (via Lawrence Journal-World). Retrieved March 3, 2011.
- Wheeler, Nicholas J. (2000) Saving Strangers – Humanitarian Intervention in International Society. Oxford University Press (Oxford, England). ISBN 978-0-19-829621-8.