Mussolini-Laval Treaty), the colonial powers of Chad and Libya, respectively, that confirmed the possession of the strip by Italy. The frontier claimed by the Chadian government was based on a 1955 treaty between France and Libya, which, in turn, referred back to an 1899 agreement between Great Britain and France about "spheres of influence." Despite other differences, this was one position on which all Chadian political parties and factions were able to agree. Libya occupied the Aouzou Strip during the first half of 1973. During the so-called Toyota War in 1987, the final stage of the Chadian–Libyan conflict, Chadian forces were able to force the Libyans to temporarily retreat from part of the Strip. A cease-fire between Chad and Libya held from 1987 to 1988, followed by unsuccessful negotiations over the next several years. Finally a 1994 International Court of Justice decision found (by a majority of 16 to 1) in favour of Chad sovereignty over the Aouzou strip, and ended the Libyan claim. The United Nations Security Council established the United Nations Aouzou Strip Observer Group in Resolution 915 (May 1994) to monitor the withdrawal of Libyan troops, and terminated it in Resolution 926 (June 1994), when the withdrawal was completed. See also Mussolini–Laval accord References External links Territorial Dispute (Libyan Arab Jamahiriya/Chad) – The case documents on ICJ website Frank Jacobs: Borderlines: The World’s Largest Sandbox, The New York Times / The Opinion Pages on November 7, 2011 Geography of Chad Geography of Libya Territorial disputes of Chad Territorial disputes of Libya Chadian–Libyan War Chad–Libya border