Demarcation line

A demarcation line means simply a boundary around a specific area, but is commonly used to denote a temporary geopolitical border, often agreed upon as part of an armistice or ceasefire.

See the following examples:

• The Blue Line is a border demarcation between Lebanon and Israel published by the United Nations on 7 June 2000 for the purposes of determining whether Israel had fully withdrawn from Lebanon.
• The Curzon Line was a demarcation line proposed in 1920 by British Foreign Secretary Lord Curzon of Kedleston as a possible armistice line between Poland to the west and the Russian Soviet Federative Socialist Republic (Russian SFSR) to the east during the Polish-Soviet War of 1919–20.
• The Foch Line was a temporary demarcation line between Poland and Lithuania proposed by the Entente in the aftermath of World War I.
• The Line of Demarcation was an imaginary longitude, moved slightly from the line drawn by Pope Alexander VI to divide new lands claimed by Portugal from those of Spain. This line was drawn in 1493 after Christopher Columbus returned from his maiden voyage to the Americas.
• The Mason-Dixon line (or "Mason and Dixon's Line") is a demarcation line between four U.S. states, forming part of the borders of Pennsylvania, Maryland, Delaware, and West Virginia (then part of Virginia). It was surveyed between 1763 and 1767 by Charles Mason and Jeremiah Dixon in the resolution of a border dispute between British colonies in Colonial America.
• The McMahon Line is a demarcation line drawn on map attached to the Simla Convention, a treaty negotiated between Great Britain, China, and Tibet and which was signed by Great Britain and Tibet in 1914.
• The Military Demarcation Line, sometimes referred to as the Armistice Line, is the border between North Korea and South Korea. The Military Demarcation Line was established by the Korean Armistice Agreement as the line between the two Koreas at the end of Korean War in 1953.
• The Northern Limit Line or North Limit Line (NLL) is a disputed maritime demarcation line in the Yellow Sea between North Korea and South Korea.
• The term Green Line is used to refer to the 1949 Armistice lines established between Israel and its neighbours (Egypt, Jordan, Lebanon and Syria) after the 1948 Arab-Israeli War.
• The Purple Line was the ceasefire line between Israel and Syria after the 1967 Six Day War.
• The Radcliffe Line was announced on 17 August 1947 as the line between India and Pakistan at the time of the Partition of India.
• The Line of Actual Control established by India and the People's Republic of China between Aksai Chin and Ladakh after the Sino-Indian War of 1962.
• The Line of Control established by India and Pakistan over the contested region of Kashmir.
• The Demarcation line in France from 1940 to 1942, with the German-occupied zone in the north and a free zone in the south.
• The Nine-dotted line is a disputed maritime demarcation line in the South China Sea between the following nations; People's Republic of China, Vietnam, Philippines, Republic of China (Taiwan) and Malaysia.