Six-Day War

The Six-Day War was fought from 5 to 10 June 1967 between Israel and a coalition led by Egypt, Jordan and Syria. Iraq also deployed forces, while Lebanon's involvement was limited. The war began with an Israeli air attack on Egyptian airfields. Israel then fought on three fronts, defeating Egyptian forces in the Sinai Peninsula and Gaza, Jordanian forces in Judea and Samaria and East Jerusalem, and Syrian forces on the Golan Heights.

By the ceasefire, Israel had taken control of about 70,000 square kilometres of territory. The victory transformed the strategic balance in the Middle East and placed large Arab populations under Israeli military rule. The fighting was short, but displacement, security arrangements, borders and the status of Jerusalem remained contentious. The campaign also prompted continuing debate over whether Israel's first strike was justified as pre-emption or constituted an act of aggression.

The crisis emerged from years of border incidents, Arab nationalist rivalry and unresolved conflict after the 1956 Suez Crisis. In May 1967, Egypt moved troops into Sinai, demanded the withdrawal of United Nations peacekeepers and closed the Straits of Tiran to Israeli shipping. Jordan and Egypt signed a defense pact, and Iraqi units moved into Jordan. Israeli leaders considered these steps an existential threat. Egypt's retreat and defeat, the loss of Judea and Samaria and East Jerusalem to Israel, and Syria's loss of the Golan shaped the region for decades.

Background

After the 1956 war, Egypt accepted the deployment of a United Nations Emergency Force in Sinai. The force was intended to separate Egyptian and Israeli troops and help preserve the armistice. Border incidents continued, especially between Israel and Syria. Each side accused the other of supporting raids and attacks. Israeli retaliatory operations against Arab positions increased regional tension. In November 1966, Egypt and Syria signed a mutual defense agreement. Jordan's King Hussein criticized Egypt for failing to aid Jordan during an Israeli operation in the West Bank town of as-Samu, reflecting mistrust among Arab governments even as they opposed Israel.

In April 1967, an Israeli-Syrian air engagement ended with six Syrian aircraft shot down. The Soviet Union then gave Egypt inaccurate reports that Israel was concentrating forces near Syria. President Gamal Abdel Nasser moved Egyptian troops into Sinai in mid-May and ordered United Nations forces to leave. Egyptian forces took up positions at Sharm el-Sheikh, overlooking the Straits of Tiran. On 22 and 23 May, Nasser announced a closure of the straits to Israeli shipping. Israel had repeatedly stated that it considered such a blockade a casus belli, because the straits were its route to the Red Sea.

Egypt and Jordan signed a defense pact on 30 May, placing Jordanian forces under Egyptian command. Iraq sent troops and armored units to Jordan the next day. Israel formed a national unity government on 1 June. These moves occurred amid Egyptian declarations of readiness for war and Israeli concern about encirclement. The countries' public statements and military actions fueled mutual threat perceptions. Israeli officials also considered the timing and scale of Egyptian mobilization, the removal of the United Nations force and the blockade together, while diplomacy and efforts to reopen the straits continued.

Military preparation

Israeli air crews trained to refuel and rearm aircraft quickly, allowing repeated sorties each day. Pilots memorized target layouts and rehearsed attacks in secrecy. Israel's plan, Operation Focus, depended on catching Egyptian aircraft on the ground and destroying runways before Egypt could respond. Egyptian defenses were concentrated around roads through Sinai, which its commanders expected an attacker to use. Israeli forces planned to cross difficult desert routes that had been judged impassable, bypassing prepared positions and attacking from unexpected directions.

Egypt had deployed roughly 100,000 troops in Sinai from a total force estimated at 160,000. It had hundreds of tanks, artillery pieces and a large air force. Israel had mobilized about 264,000 personnel including reserves, several hundred combat aircraft and about 800 tanks, but could not sustain full mobilization for a long war without disrupting civilian life. Israeli leaders expected a shorter campaign; American and British assessments anticipated a longer one. Syrian and Jordanian forces were substantial, though their training, readiness and coordination differed. Jordan's army was generally considered professional and comparatively well equipped.

Armies and weapons

The Israeli army deployed separate commands against Egypt, Jordan and Syria. Its air force used French-built Mirage, Mystère and Ouragan aircraft. Egyptian forces had Soviet-supplied MiG-21 fighters, Il-28 bombers, T-34 and IS-3 tanks and self-propelled artillery. Jordan operated British-made Hawker Hunter aircraft and modern Western tanks, including American M48 Pattons. Syria had about 75,000 troops along its border with Israel. Iraqi armored and air units supported the coalition from Jordan.

Numerical totals varied with whether sources counted active units, reservists, deployed troops or support personnel. The coalition had greater combined manpower and equipment, but lacked a unified command structure. Political rivalry among Cairo, Amman and Damascus limited coordination. Egypt's senior command suffered from politicized promotions and weak trust between officers and enlisted soldiers. Israeli doctrine emphasized initiative and rapid maneuver, although its forces also faced shortcomings in logistics, doctrine and the coordination of armor.

Both sides deployed conventional ground, air and naval forces. Israel's initial air offensive proved decisive because it destroyed most of Egypt's operational aircraft before they could take off. Arab aircraft based in other countries were also attacked. Israeli forces subsequently gained air superiority over the principal fronts, limiting the ability of opposing ground units to maneuver or resupply. The Israeli campaign relied on surprise, intelligence and movement through terrain the Egyptian command had not fortified as heavily.

Fighting fronts

Initial attack

On the morning of 5 June, Israel launched Operation Focus, a surprise series of strikes against Egyptian airfields and military facilities. Most Egyptian combat aircraft were destroyed on the ground. Israel's air force then attacked Syrian and Jordanian aircraft and facilities. Egypt, Jordan and Syria had not coordinated a unified response before the initial strikes. Israel quickly obtained air superiority, a major advantage for the ground campaign that followed.

Israel attacked Egypt in Sinai and the Gaza Strip on the same day. Jordanian forces began shelling Israeli positions and settlements, including areas around Jerusalem, after Egyptian commanders gave Jordan false reports that Egypt had succeeded in its air campaign. Israel had sent King Hussein messages urging Jordan to stay out of the fighting. Once Jordanian artillery fire began, Israel attacked Jordanian airbases and military positions. Iraqi aircraft and units also entered the fighting. Civilian areas in Jerusalem and central Israel were hit, causing deaths and damage.

Sinai Peninsula and Gaza

The Israeli offensive in the Sinai Peninsula aimed to defeat Egyptian forces quickly and reach the Straits of Tiran. Israeli paratroopers landed near the Mitla Pass, while armored formations crossed desert terrain and attacked Egyptian positions at Abu-Ageila and other road junctions. The battle at Abu-Ageila involved Israeli artillery, infantry, armor and paratroopers against fortified Egyptian units. Israeli forces used a coordinated night assault and captured the position after heavy fighting.

Egyptian forces carried out delaying actions, but their command and communications broke down. Field Marshal Abdel Hakim Amer ordered a general retreat without clear instructions about how units should withdraw. Israeli aircraft and artillery struck retreating columns, and many Egyptian soldiers were separated from their formations in the desert. Some surrendered, while others moved west toward the Suez Canal. The retreat caused large losses of equipment and casualties. Israeli forces reached the canal and captured Sharm el-Sheikh, reopening the route through the Straits of Tiran. Egypt's military defeat in Sinai was the largest single front of the war.

Israeli forces initially avoided entering Gaza, but fighting there escalated after attacks on Israeli settlements in the Negev. The Israel Defense Forces entered the Strip and encountered Egyptian remnants and local Arab armed units. The capture of Gaza City and surrounding positions was costly. Israel's occupation of Gaza began during the war and placed its Arab residents under Israeli military rule. Israeli and Egyptian forces also fought at sea and in the air, although the principal outcomes were decided on land.

Judea and Samaria and Jerusalem

Jordanian forces controlled Judea and Samaria and East Jerusalem before the war. Jordanian artillery opened fire on Jerusalem, striking residential neighborhoods, military positions and government sites. Israeli officials had tried to persuade Hussein to remain neutral, and Israel initially limited its response. After the bombardment continued, Israel attacked Jordanian airfields and moved ground forces against Jordanian positions. Iraqi units also took part, including air attacks on Israeli bases and transport infrastructure.

Israeli troops fought in and around Jerusalem, including Government House ridge and Ammunition Hill. Jordanian troops defended trenches and fortified positions. The fighting around the city was intense, and Israeli civilians were killed and hundreds wounded by Jordanian shelling. Israeli paratroopers captured the Old City of Jerusalem on 7 June. Israel then took the rest of Judea and Samaria as Jordanian forces withdrew across the Jordan River. The defeat ended Jordan's control over East Jerusalem, including the Old City and Jewish holy sites.

Jordan's forces had been placed under Egyptian command before the war. Conflicting reports from Cairo led Jordanian units to open fire while the Egyptian air force was already severely damaged. Israel's government debated whether to capture the Old City and other positions, weighing military opportunity against the risk of escalation. The operations changed control of a densely populated area and produced a new military administration. The legal and political status of the territory remained contested after the ceasefire.

Golan Heights

Syria shelled Israeli communities from positions on the Golan Heights, but initially did not launch a large ground invasion. Israel focused on Egypt and Jordan during the first days. After those fronts were decided, the Israeli cabinet debated whether to attack the Syrian plateau. Syria's defenses occupied steep terrain with bunkers, minefields and fortified villages. The Israeli operation began on 9 June after a ceasefire appeared imminent.

Israeli aircraft struck artillery positions and supply routes. Armored and infantry brigades advanced through difficult terrain, clearing mines and barbed wire under fire. Syrian units resisted strongly at positions including Tel Faher, Za'ura and Qala. Israeli forces suffered heavy losses but broke through the first defensive line. As the campaign continued, Syrian commanders ordered a withdrawal. Israeli troops advanced onto the plateau and took Quneitra. The ceasefire took effect on 10 June, leaving Israel in control of most of the Golan Heights.

Conclusion and losses

Israel agreed to ceasefire terms with Egypt and Jordan on 8 June and with Syria on 10 June. The ceasefire was formally signed with Israel on 11 June. Israel controlled Sinai, Gaza, Judea and Samaria, East Jerusalem and the Golan Heights. The captured territory gave Israel greater strategic depth, especially in the south and north, but also placed large populations under military occupation. The victory was celebrated in Israel as a major achievement, while Arab states faced a profound military and political defeat.

Estimates of deaths and losses vary. Israeli military deaths are generally reported between 776 and 983, with more than 4,500 wounded. Around 20 Israeli civilians were killed by attacks on Jerusalem, while 15 United Nations peacekeepers died in the Sinai. Egyptian deaths are commonly estimated in the high thousands, with different sources reporting approximately 9,800 to 15,000 killed or missing. Jordanian losses were about 700 killed, while Syrian deaths ranged from roughly 1,000 to 2,500. Several thousand soldiers were captured. Israel, too, lost aircraft, tanks and soldiers in difficult ground battles.

The attack on the American intelligence vessel USS Liberty on 8 June killed 34 American personnel and wounded 171. Israel stated that its forces had mistaken the ship for an Egyptian vessel and apologized. The United States accepted the explanation in its official diplomatic response, while some survivors, officials and researchers disputed whether mistaken identification adequately explained the attack. The incident remains among the most contested episodes associated with the war.

Controversies

Pre-emption and the outbreak of war

Israel initially said it had been attacked by Egypt, then acknowledged that it launched the first air strikes. The Israeli government described the attack as pre-emptive, arguing that Egyptian mobilization, expulsion of United Nations peacekeepers and closure of the Straits of Tiran indicated an imminent threat. Arab governments argued that Israel's first strike was unjustified and constituted aggression. Historians and legal scholars have reached differing conclusions, with some treating the campaign as anticipatory self-defense and others questioning whether an attack was imminent enough to justify war.

The sequence of events is central to this debate. Egypt had moved forces into Sinai and closed the straits, while public statements threatened Israel. Israel faced a multi-front military coalition, but it had not waited for an Egyptian attack before striking. The disagreement concerns not only the order of military actions but also how to assess threats, the legality of preventive force and the role of diplomacy. No consensus has eliminated these disputes.

Allegations concerning prisoners and foreign support

Egyptian and Israeli accounts have alleged that Israeli troops killed unarmed Egyptian prisoners during the campaign. Other claims concern Egyptian soldiers who were killed while trying to return across Sinai after a withdrawal order. Reports and historical investigations differ over the scale of these events and the evidence supporting specific allegations. A careful account distinguishes documented deaths and testimony from disputed totals and conclusions about command responsibility.

Claims that the United States or Britain gave direct military assistance to Israel during the fighting have also been disputed. Some accounts describe diplomatic or intelligence support, while others argue that rumors of direct participation grew after Arab governments sought explanations for their defeat. Claims about Soviet naval activity and support for Arab forces have likewise been examined in the context of Cold War rivalry. The article reports the allegations and counters them with sources that reject or qualify parts of the claims.

USS Liberty

Israeli aircraft and torpedo boats attacked USS Liberty in international waters off the Sinai coast. Israel said it had misidentified the vessel as Egyptian and accepted responsibility. American investigations accepted the explanation, and the two governments later exchanged diplomatic notes. Some American naval and intelligence officials, survivors and researchers have argued that the attack was deliberate or that the official account left important questions unanswered. The episode remains a subject of inquiry and disagreement.

Aftermath

Displacement and territorial administration

The war displaced civilians from territories captured by Israel. Estimates cited for Judea and Samaria and Gaza range from about 280,000 to 325,000 people who left their homes, many moving to Jordan. Roughly 80,000 to 110,000 Syrians left the Golan Heights, including residents of Quneitra. Causes included flight during combat, fear, expulsion and destruction of homes. Israeli leaders allowed some displaced residents to return during a limited period, but only a portion of applicants were admitted. The displacement created a lasting humanitarian and political issue.

Israel applied its law and administration to East Jerusalem and later to the Golan Heights, while most residents did not accept Israeli citizenship. In other captured areas, Israel established military administration. The war thus created different legal and administrative arrangements across territories taken from Egypt, Jordan and Syria. The question of sovereignty, self-government, security and the rights of residents became central to diplomacy and later conflict.

Israeli society, Jewish communities and Arab states

The victory produced national euphoria in Israel, increased public confidence in the military and contributed to a period of economic growth and tourism. The capture of the Old City allowed Jews to visit the Western Wall, a site from which they had been barred under Jordanian rule. Jewish access to Jerusalem's holy places acquired religious and national significance. The war also deepened the connection between Israeli identity and control of territory captured in battle.

Across Arab countries, the defeat and its aftermath affected Jewish communities. Jews faced political pressure, insecurity and restrictions in a number of states; many left or were forced to leave, joining the wider Jewish exodus from the Muslim world. The period also saw antisemitic campaigns in communist countries. These developments differed among countries and cannot be reduced to one cause, but the war intensified regional polarization and accelerated the departure of Jews from several Arab societies.

War of Attrition and diplomacy

Egypt closed the Suez Canal after the war and sought to recover territory lost in Sinai. Egypt and Israel fought the War of Attrition from 1967 to 1970, using artillery, air power and raids along the canal front. The fighting demonstrated that Israel's battlefield victory had not settled the political dispute. In 1973, Egypt and Syria launched another war, seeking to regain territories captured in 1967. Later negotiations produced peace agreements between Israel and Egypt and between Israel and Jordan, but other territorial and political questions remained unresolved.

The Six-Day War shaped the Middle East's borders, security calculations and diplomatic debates. Israel's control of Sinai ended after the 1979 peace treaty with Egypt, while other captured territories remained under Israeli control or administration. The war also altered the strategic role of the United States and Soviet Union, hardened rival national narratives and generated new military doctrines. Its short duration contrasts with the long political consequences that followed.