Green Line (Israel) in the context of "Borders of Israel"

The West Bank is on the western bank of the Jordan River and is the larger of the two Palestinian territories (the other being the Gaza Strip) that make up the State of Palestine. A landlocked territory near the coast of the Mediterranean Sea in West Asia's Levant region, it is bordered by Jordan and the Dead Sea to the east and by Israel (via the Green Line) to the south, west, and north. Since 1967, the territory has been under Israeli occupation, which has been regarded as illegal under the law of the international community.

The territory first emerged in the wake of the 1948 Arab–Israeli War as a region occupied and subsequently annexed by Jordan. Jordan ruled the territory until the 1967 Six-Day War, when it was occupied by Israel. Since then, Israel has administered the West Bank (except for East Jerusalem, which was effectively annexed in 1980) as the Judea and Samaria Area. Jordan continued to claim the territory as its own until 1988. The mid-1990s Oslo Accords split the West Bank into three regional levels of Palestinian sovereignty, via the Palestinian National Authority (PNA): Area A (PNA), Area B (PNA and Israel), and Area C (Israel, comprising 60% of the West Bank). The PNA exercises total or partial civil administration over 165 Palestinian enclaves across the three areas.

The status of Jerusalem has been described as "one of the most intractable issues in the Israeli–Palestinian conflict" due to the long-running territorial dispute between Israel and Palestine, both of which claim it as their capital city. Part of this issue of sovereignty is tied to concerns over access to the holy sites of Jerusalem in the Abrahamic religions; the current religious environment in Jerusalem is upheld by the "Status Quo" of the former Ottoman Empire. As the Israeli–Palestinian peace process has primarily navigated the option of a two-state solution, one of the largest points of contention has been East Jerusalem, which was part of the Jordanian-annexed West Bank until the beginning of the Israeli occupation in 1967.

The United Nations recognizes East Jerusalem (and the West Bank as a whole) as the territory for an independent Palestinian state, thus rejecting Israel's claim to that half of the city. There is broader consensus among the international community with regard to West Jerusalem being Israel's capital city, as it falls within Israel's sovereign territory (per the Green Line) and has been recognized as under Israeli control since the 1949 Armistice Agreements.

The 1948 Palestine war was fought in the territory of what had been, at the start of the war, British-ruled Mandatory Palestine. During the war, Zionist forces conquered territory and established the State of Israel, over 700,000 Palestinians fled or were expelled from Palestine, the British withdrew from their Mandate of Palestine, and four neighbouring Arab nations entered the territory and joined the war. By the end of the war, the State of Israel had held or captured about 78% of former territory of the mandate, the Kingdom of Jordan had captured and later annexed the area that became the West Bank, and Egypt had captured the Gaza Strip. The war formally ended with the 1949 Armistice Agreements, which established the State of Israel and laid out the Green Line demarcating these territories. It was the first war of the Israeli–Palestinian conflict and the broader Arab–Israeli conflict.

The war had two main phases, the first being the 1947–1948 civil war, which began on 30 November 1947, a day after the United Nations voted to adopt the Partition Plan for Palestine, which planned for the division of the territory into Jewish and Arab sovereign states. During this period, the British still maintained a declining rule over Palestine and occasionally intervened in the violence. Initially on the defensive, the Zionist forces switched to the offensive in April 1948. In anticipation of an invasion by Arab armies, they enacted Plan Dalet, an operation aimed at securing territory for the establishment of a Jewish state.

The occupation of the Gaza Strip by the United Arab Republic began in 1959 following the dissolution of the All-Palestine Protectorate, which had ruled the Gaza Strip as a client state of Egypt since the 1948 Arab–Israeli War, and its merger with the United Arab Republic.

The 1949 Armistice Agreements, which ended the Arab–Israeli War by delineating the Green Line as the armistice line between Israel and its four neighboring countries (Lebanon, Syria, Jordan, and Egypt), left the Kingdom of Egypt in control of a small swath of territory that was part of Mandatory Palestine prior to the war. That swath of territory became known as the Gaza Strip. In 1949 Egypt created the client state named the All-Palestine Government which lasted until 1959, the year after the Republic of Egypt and the Second Syrian Republic merged to form a single sovereign state known as the United Arab Republic. The Egyptian occupation of the Gaza Strip was interrupted for 4 months in late 1956 and early 1957 when Israel briefly occupied the strip as part of the 1956 Suez Crisis. The Egyptian occupation ended entirely during the 1967 Six-Day War, after which the territory became occupied by Israel with the establishment of the Israeli Military Governorate.

The 1949 Armistice Agreements were signed between Israel and Egypt, Lebanon, Jordan, and Syria. They formally ended the hostilities of the 1948 Palestine War and also demarcated the Green Line, which separated Arab-controlled territory (i.e., the Jordanian-annexed West Bank and the Egyptian-occupied Gaza Strip) from Israel until the latter's victory in the 1967 Six-Day War.

To monitor the agreed-upon de facto border, the United Nations (UN) established supervising and reporting agencies; discussions related to the ceasefire's enforcement led to the signing of the separate Tripartite Declaration of 1950, in which the United States, the United Kingdom, and France pledged to take action within and outside of the UN in order to prevent violations of the frontiers. 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 between Arab countries and Israel.

Israeli settlements, also called Israeli colonies, are the civilian communities built by Israel throughout the Israeli-occupied territories. They are populated by Israeli citizens, almost exclusively of Jewish identity or ethnicity, and have been constructed on lands that Israel has militarily occupied since the Six-Day War in 1967. The international community considers Israeli settlements to be illegal under international law, but Israel disputes this. In 2024, the International Court of Justice (ICJ) found in an advisory opinion that Israel's occupation was illegal and ruled that Israel had "an obligation to cease immediately all new settlement activities and to evacuate all settlers" from the occupied territories. The expansion of settlements often involves the confiscation of Palestinian land and resources, leading to displacement of Palestinian communities and creating a source of tension and conflict. Settlements are often protected by the Israeli military and are frequently flashpoints for violence against Palestinians. Furthermore, the presence of settlements and Jewish-only bypass roads creates a fragmented Palestinian territory, seriously hindering economic development and freedom of movement for Palestinians.

As of April 2025, Israeli settlements exist in the West Bank (including East Jerusalem), which is claimed by the Palestine Liberation Organization (PLO) as the sovereign territory of the State of Palestine, and in the Golan Heights, which is internationally recognized as a part of the sovereign territory of Syria. Through the Jerusalem Law and the Golan Heights Law, Israel effectively annexed both territories, though the international community has rejected any change to their status as occupied territory. Although Israel's West Bank settlements have been built on territory administered under military rule rather than civil law, Israeli civil law is "pipelined" into the settlements, such that Israeli citizens living there are treated similarly to those living in Israel. Many consider it to be a major obstacle to the Israeli–Palestinian peace process. In Legal Consequences of the Construction of a Wall in the Occupied Palestinian Territory (2004), the ICJ found that Israel's settlements and the then-nascent Israeli West Bank barrier were both in violation of international law; part of the latter has been constructed within the West Bank, as opposed to being entirely on Israel's side of the Green Line.

The 1948 Arab–Israeli War, also known as the First Arab–Israeli War, followed the civil war in Mandatory Palestine as the second and final stage of the 1948 Palestine war. The civil war became a war of separate states with the Israeli Declaration of Independence on 14 May 1948, the end of the British Mandate for Palestine at midnight, and the entry of a military coalition of Arab states into the territory of Mandatory Palestine the following morning. The war formally ended with the 1949 Armistice Agreements which established the Green Line.

Since the 1917 Balfour Declaration and the 1920 creation of the British Mandate of Palestine, and in the context of Zionism and the mass migration of European Jews to Palestine, there had been tension and conflict between Arabs, Jews, and the British in Palestine. The conflict escalated into a civil war 30 November 1947, the day after the United Nations adopted the Partition Plan for Palestine proposing to divide the territory into an Arab state, a Jewish state, and an internationally administered corpus separatum for the cities of Jerusalem and Bethlehem.