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Iran–Israel proxy conflict

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map that shows both Israel and Iran
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Through Israeli–Palestinian conflict and Dissolution of the Soviet Union

Motivated by the periphery doctrine, Imperial Iran and Israel had close relations, seeing Arab powers as a common threat. After the 1979 Islamic revolution, Iran cut off relations, but covert ties continued during the subsequent Iran–Iraq War. Iran trained and armed Hezbollah to resist the Israel's 1982 invasion of Lebanon, and continued to back Shia militias throughout the Israeli occupation of Southern Lebanon. Even before 1979, Iranian Islamists had materially supported the Palestinians; after 1979 Iran attempted to form close relations with the Palestine Liberation Organization, and later with Palestinian Islamic Jihad and Hamas. Israel fought a war with Hezbollah in 2006. Israel has fought several wars with Palestinians in and around the Gaza Strip: in 2008–2009, 2012, 2014, 2021 and since 2023. The 1982 Lebanon War and Gaza war have been the deadliest wars of the Arab–Israeli conflict.

Various reasons have been given for the Iran–Israel conflict. Iran and Israel had previously enjoyed warm ties due to common threats, but by the 1990s the USSR had dissolved and Iraq had been weakened. Iranian Islamists have long championed the Palestinian people, whom they perceive as oppressed. Scholars believe that by supporting the Palestinians, Iran seeks greater acceptance among Sunnis and Arabs, both of whom dominate the Middle East. At times, Iran has supported the one-state and the two-state solution as a response to the plight of Palestinians, while the country has also used more inflammatory language to predict Israel's demise. Israel sees Iran as an existential threat. Israel has accused Iran of harboring genocidal intentions, while Iran has accused Israel of conducting a genocide in Gaza. Consequently, Israel has sought sanctions and military action against Iran to stop it from acquiring nuclear weapons. News outlets expressed how Iranian proxy militias stayed largely silent and left Iran "isolated in war" during the 2025 war with Israel.

Background

Iranian Islamists have a long history of sympathizing with the Palestinians. In 1949, Iranian ayatollah Mahmoud Taleghani visited the West Bank and was moved by the plight of Palestinian refugees. Taleghani began advocating for Palestinians in the 1950s and 1960s. After the Six-Day War in 1967, he raised funds (e.g. zakat) inside Iran to be sent to Palestinians. The Iranian government at the time was alarmed at these activities and SAVAK documents indicate that the government believed that the Iranian public was sympathetic to the Palestinian people. Likewise Ruhollah Khomeini championed the Palestinian people before he became Iran's Supreme Leader in 1979. He also criticized the Pahlavi dynasty's ties with Israel, viewing Israel as a supporter of the Pahlavi regime. Following the 1979 Iranian revolution, Khomeini's new government adopted a policy of hostility towards Israel. The new Iranian government saw Israel as a colonial outpost. Iran withdrew recognition of Israel as a state, and severed all diplomatic, commercial and other ties with Israel, referring to its government as the "Zionist regime" and Israel as "occupied Palestine".

Despite the tension between the two countries, Israel provided support to Iran during the Iran–Iraq War from 1980 to 1988. During the war, Israel was one of the main suppliers of military equipment to Iran and also provided military instructors. Israel gave direct support to Iran's war effort when it bombed and destroyed Iraq's Osirak nuclear reactor in Operation Babylon. The nuclear reactor was considered a central component of Iraq's nuclear weapons program.

The 1982 Israeli invasion of Lebanon resulted in the departures of the Palestine Liberation Organization (PLO) from Lebanon. The ensuing Israeli occupation of Southern Lebanon temporarily benefited Israeli allies in Lebanon and the civilian Israeli population with fewer violent attacks on Northern Israel by Hezbollah than previously by PLO in the 1970s. However, the Sabra and Shatila massacre perpetrated by Israeli proxies (the Maronite Lebanese Forces and right-wing Phalangists) against Lebanese Shias had as a long-term consequence the emergence of a homegrown Lebanese, rather than Palestinian, resistance movement within South Lebanon, which by the second half of the 1990s was posing more strategic trouble to Israel than the PLO could pose in the 1970s.

Iran has periodically called for the destruction of Israel. Iran has established a network of allies and proxy forces across the Middle East, which it describes as part of an "axis of resistance" aimed at opposing US and Israeli interests in the area. Israel views Iran as an existential threat on account of Tehran's rhetoric, its support for proxy forces in the region, and its arming and financing of Palestinian groups such as Hamas. In some cases, proxy groups evolved into political parties, a transition that was both encouraged and nurtured by Iran. These dual-role proxies earned political legitimacy while masking terrorist activities. U.S. intelligence officials said they believe Iran does not seek a broader conflict, arguing that the primary goal of Iranian proxies is to target Israel and the United States in a way that avoids triggering a large-scale war. The United States is considered to be Israel's largest "military backer". Germany, Britain, and Italy have also supplied weapons to Israel.

As detailed by the Stimson Center, Iran has historically employed at least four main fronts: Hamas in Gaza, Hezbollah in Lebanon, Shiʿite militias in Iraq, and the Houthis in Yemen. According to the report the goal is to compel Israel to defend on multiple fronts simultaneously, reducing its ability to focus on Iranian nuclear or military capabilities and pressure Israel indirectly.

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