High Quality Content by WIKIPEDIA articles! The 2008 Turkish incursion into northern Iraq, code-named Operation Sun by the Turkish Armed Forces, began on February 21, 2008, when the Turkish Army sent troops into northern Iraq to target the Kurdistan Workers Party (PKK). The ground offensive was preceded by Turkish Air Force aerial bombardments against PKK camps in northern Iraq, which began on December 16, 2007. This constituted the "first confirmed ground incursion" of Iraq since the 2003 U.S.-led invasion. Initial reports indicated that up to 10,000 troops had taken part in the operation, while later reports indicated just several hundred. Turkish Armed Forces, Turkish Army, Kurdistan Workers' Party, Turkish Air Force , 2003 invasion of Iraq, October 2007 clashes in Hakkari.