The 1949 Armistice Agreements are a set of agreements signed during 1949 between Israel and neighboring Egypt, Lebanon, Jordan, and Syria. The agreements ended the official hostilities of the 1948 Arab-Israeli War, and established armistice lines between Israel and the Jordanian-held West Bank, also known as the Green Line. The United Nations established supervising and reporting agencies to monitor the established armistice lines. In addition, discussions related to the armistice enforcement, led to the signing of the separate Tripartite Declaration of 1950 between the United States, Britain and France. In it, they pledged to take action within and outside the United Nations to prevent violations of the frontiers or armistice lines. It also outlined their commitment to peace and stability in the area, their opposition to the use or threat of force, and reiterated their opposition to the development of an arms race. These lines held until the 1967 Six-Day War.