Government crackdown against al-Qaeda cells began in 2001, escalating steadily until 14 January 2010, when Yemen declared open war on al-Qaeda. In addition to battling al-Qaeda across several provinces, Yemen was forced to contend with a Shia insurgency in the north and militant separatists in the south. Fighting with al-Qaeda escalated further during the course of the 2011 Yemeni revolution, with Jihadists seizing most of the Abyan Governorate and declaring it an Emirate. A second wave of violence began in early 2012, with militants claiming territory across the southwest amid heavy combat with government forces.