The 2006 Lebanon War, also called the 2006 Israel–Hezbollah War and known in Lebanon as the July War (Arabic: حرب تموز, Ḥarb Tammūz) and in Israel as the Second Lebanon War (Hebrew: מלחמת לבנון השנייה, Milhemet Levanon HaShniya), was a 34-day military conflict in Lebanon, Northern Israel and the Golan Heights. The principal parties were Hezbollah paramilitary forces and the Israel Defense Forces (IDF). The conflict started on 12 July 2006, and continued until a United Nations-brokered ceasefire went into effect in the morning on 14 August 2006, though it formally ended on 8 September 2006 when Israel lifted its naval blockade of Lebanon. Due to unprecedented Iranian military support to Hezbollah before and during the war, some consider it the first round of the Iran–Israel proxy conflict, rather than a continuation of the Arab–Israeli conflict.

The conflict was precipitated by the 2006 Hezbollah cross-border raid. On 12 July 2006, Hezbollah fighters fired rockets at Israeli border towns as a diversion for an anti-tank missile attack on two armored Humvees patrolling the Israeli side of the border fence.

The ambush left three soldiers dead. Two Israeli soldiers were abducted and taken by Hezbollah to Lebanon. Five more were killed in Lebanon, in a failed rescue attempt. Hezbollah demanded the release of Lebanese prisoners held by Israel in exchange for the release of the abducted soldiers.

The conflict is believed to have killed between 1,191 and 1,300 Lebanese people, and 165 Israelis. It severely damaged Lebanese civil infrastructure, and displaced approximately one million Lebaneseand 300,000–500,000 Israelis.

Hezbollah rockets and mortars killed 44 Israeli civilians during the conflict, including a severely wounded Haifa resident who died from his wounds more than a year after the war. In addition four elderly died of heart attacks during rocket attacks. At least 19 of the 46 Israeli civilians killed by Hezbollah rockets and mortars were Israeli Arabs (mainly Sunni Muslims). The last civilian victim was an Israeli-Arab man who died on 30 August 2007, from injuries sustained in a rocket attack on Haifa. In addition, 4,262 civilians were injured–33 seriously wounded, 68 moderately, 1,388 lightly, and 2,773 suffered from shock and anxiety. According to Human Rights Watch, "These bombs may have killed 'only' 43 civilians, but that says more about the availability of warning systems and bomb shelters throughout most of Northern Israel and the evacuation of more than 350,000 people than it does about Hezbollah's intentions.

On 11 August 2006, the United Nations Security Council unanimously approved United Nations Security Council Resolution 1701 (UNSCR 1701) in an effort to end the hostilities.

The resolution, which was approved by both the Lebanese and Israeli governments the following days, called for disarmament of Hezbollah, for withdrawal of the IDF from Lebanon, and for the deployment of the Lebanese Armed Forces and an enlarged United Nations Interim Force in Lebanon (UNIFIL) in the south. UNIFIL was given an expanded mandate, including the ability to use force to ensure that their area of operations was not used for hostile activities, and to resist attempts by force to prevent them from discharging their duties.

On 16 July, eight employees of the Israel Railways were killed by direct rocket hits on the Haifa train depot. Hezbollah leader Hassan Nasrallah defended the attacks, saying that Hezbollah initially had aimed its rockets on "military sites only". But since Israel, he said, had systematically bombed civilian targets he felt that Hezbollah had no choice but to answer in kind and target Israeli cities.

The attack on the Haifa depot was not the first civilian target to be hit by Hezbollah. Civilians in the border communities were hurt in the initial cover fire on IDF positions for the cross-border raid. Two Israeli civilians were killed in an attack near the air force base at Mount Meron on July, 14. Since Hezbollah rockets were not very accurate it is unclear whether civilians were intentionally targeted in these attacks. After the attack on Haifa, however, Hezbollah made no attempt to cover this fact. According to a Human Rights Watch study civilian Israeli targets were mentioned four times as often in official Hezbollah war time communiques as was military targets.

Israel refused and responded with airstrikes and artillery fire on targets in Lebanon. Israel attacked both Hezbollah military targets and Lebanese civilian infrastructure, including Beirut's Rafic Hariri International Airport.

Israeli Prime Minister Ehud Olmert described the seizure of the soldiers as an "act of war" by the sovereign state of Lebanon, stating that "Lebanon will bear the consequences of its actions" and promising a "very painful and far-reaching response." Israel blamed the Lebanese government for the raid, as it was carried out from Lebanese territory. Hezbollah had two ministers serving in the Lebanese cabinet at that time. In response, Lebanese Prime Minister Fouad Siniora denied any knowledge of the raid and stated that he did not condone it. An emergency meeting of the Lebanese government reaffirmed this position.

The IDF launched a ground invasion of Southern Lebanon. Israel also imposed an air and naval blockade. Hezbollah then launched more rockets into northern Israel and engaged the IDF in guerrilla warfare from hardened positions.

The blockade was lifted on 8 September 2006. On 1 October 2006, most Israeli troops withdrew from Lebanon, although the last of the troops continued to occupy the border-straddling village of Ghajar.

The Israel Defense Forces attacked targets within Lebanon with artillery and airstrikes hours before the Israeli Cabinet met to discuss a response. The targets consisted of bridges and roads in Lebanon, which were hit to prevent Hezbollah from transporting the abductees. An Israeli airstrike also destroyed the runways of Beirut Rafic Hariri International Airport. 44 civilians were killed.

The Israeli Air Force also targeted Hezbollah's long range rocket and missile stockpiles destroying many of them on the ground in the first days of the war. Many of Hezbollah's longer-range rocket launchers were destroyed within the first hours of the Israeli attack.

In the time since the enactment of UNSCR 1701 both the Lebanese government and UNIFIL have stated that they will not disarm Hezbollah. The remains of the two captured soldiers, whose fates were unknown, were returned to Israel on 16 July 2008 as part of a prisoner exchange.
Terms for a ceasefire had been drawn and revised several times over the course of the conflict, yet successful agreement between the two sides took several weeks. Hezbollah maintained the desire for an unconditional ceasefire, while Israel insisted upon a conditional ceasefire, including the return of the two seized soldiers. Lebanon frequently pleaded for the United Nations Security Council to call for an immediate, unconditional ceasefire between Israel and Hezbollah. John Bolton confirmed that the US and UK, with support from several Arab leaders, delayed the ceasefire process. Outsider efforts to interfere with a ceasefire only ended when it became apparent Hezbollah would not be easily defeated.
On 11 August 2006 the United Nations Security Council unanimously approved UN Security Council Resolution 1701, in an effort to end the hostilities. It was accepted by the Lebanese government and Hezbollah on 12 August 2006, and by the Israeli government on 13 August 2006. The ceasefire took effect at 8:00 AM (5:00 AM GMT) on 14 August 2006.
Before the ceasefire, the two Hezbollah members of cabinet said that their militia would not disarm south of the Litani River, according to another senior member of the Lebanese cabinet, while a top Hezbollah official similarly denied any intention of disarming in the south. Israel said it would stop withdrawing from Southern Lebanon if Lebanese troops were not deployed there within a matter of days.