The legitimacy of the State of Israel has been questioned since before the state was formed. There has been opposition to Zionism, the movement to establish a Jewish state in Palestine, since its emergence in 19th-century Europe. Since the establishment of the State of Israel and the concurrent Nakba in 1948, a number of figures, organizations, and states have challenged Israel's political legitimacy and its occupation of territories belonging to Palestine, Syria, Lebanon, and Egypt. Over the course of the Israeli–Palestinian conflict and broader Arab–Israeli conflict, the country's authority has also been questioned on a number of fronts.