Cyrenaica (ˌsaɪrəˈneɪɪkə,_ˌsɪr- ) or Kyrenaika (Barqah, Kurēnaïkḗ [eparkhíā], after the city of Cyrene), is the eastern region of Libya. Cyrenaica includes all of the eastern part of Libya between the 16th and 25th meridians east, including the Kufra District. The coastal region, also known as Pentapolis ("Five Cities") in antiquity, was part of the Roman province of Crete and Cyrenaica, later divided into Libya Pentapolis and Libya Sicca. During the Islamic period, the area came to be known as Barqa, after the city of Barca. Cyrenaica became an Italian colony in 1911. After the 1934 formation of Italian Libya, the Cyrenaica province was designated as one of the three primary provinces of the country. During World War II, it fell under British military and civil administration from 1943 until 1951, and finally in the Kingdom of Libya from 1951 until 1963. The region that used to be Cyrenaica officially until 1963 has formed several shabiyat, the administrative divisions of Libya, since 1995. The 2011 Libyan Civil War started in Cyrenaica, which came largely under the control of the National Transitional Council (headquartered in Benghazi) for most of the war. In 2012, a body known as the Cyrenaica Transitional Council unilaterally declared Cyrenaica to be an autonomous region of Libya. Geologically, Cyrenaica rests on a mass of Miocene limestone that tilts up steeply from the Mediterranean Sea and falls inland with a gradual descent to sea level again. This mass is divided into two blocks. The Jebel Akhdar extends parallel to the coast from the Gulf of Sidra to the Gulf of Bomba and reaches an elevation of 882 meters. There is no continuous coastal plain, the longest strip running from the recess of Gulf of Sidra past Benghazi to Tolmeita. Thereafter, except for deltaic patches at Susa and Derna, the shore is all precipitous. A steep escarpment separates the coastal plain from a relatively level plateau, known as the Marj Plain, which lies at about 300 meters elevation.