Operation Barkhane was a counterinsurgency operation that started on 1 August 2014 and formally ended on 9 November 2022. It was led by the French military against Islamist groups in Africa's Sahel region and consisted of a roughly 3,000-strong French force, which was permanently headquartered in N'Djamena, the capital of Chad. The operation was led in co-operation with five countries, all of which are former French colonies that span the Sahel: Burkina Faso, Chad, Mali, Mauritania and Niger. Mali was a part of the operation until August 2022. The countries are collectively referred to as the "G5 Sahel". The operation was named after a crescent-shaped dune type that is common in the Sahara desert.