The insurgency in the Maghreb refers to the Islamist insurgency in the Maghreb and Sahel regions of North Africa that followed on from the Algerian Civil War. The Algerian militant group Salafist Group for Preaching and Combat (GSPC) allied itself with al-Qaeda to eventually become al-Qaeda in the Islamic Maghreb (AQIM). The Algerian and other Maghreb governments fighting the militants have worked with the United States and the United Kingdom since 2007, when Operation Enduring Freedom – Trans Sahara began. While the 2011 Arab Spring affected support for the insurgency, it also presented military opportunities for the jihadists. In 2012, AQIM and Islamist allies captured the northern half of Mali, until being fought back less than a year later following a French-led foreign intervention, w