Opération Harmattan was the French participation in the 2011 military intervention in Libya. It was named for the Harmattan, which are hot dry winds that blow over the Sahara, mostly between November and March. The United States' counterpart to this was Operation Odyssey Dawn, the Canadian counterpart was Operation Mobile and the British counterpart was Operation Ellamy. The no-fly zone was proposed during the Libyan Civil War to prevent government forces loyal to Muammar Gaddafi from carrying out air attacks on anti-Gaddafi forces. Several countries prepared to take immediate military action at a conference in Paris on 19 March 2011.