The Blue Line is based on the deployment of the IDF prior to 14 March 1978. It should not be confused with the Green Line, established in 1949, which is the armistice line of the 1948 Arab–Israeli War, nor the Green Line in Beirut during the violence of the 1980s. The 1949 line is in turn the same as the 1923 Mandate Line which was the border between French- and British-mandated territory (see: Paulet–Newcombe Agreement); Lebanon is a former French mandate and Palestine / Israel a former British mandate. (See League of Nations). The 1949 agreement stated that the border would follow the 1923 line. In 1923, 38 boundary markers were placed along the 49 mile border and a detailed text description was published. The 2000 Blue Line differs in about a half dozen short stretches from the 1949 line, though never by more than 475 meters.