https://crsreports.congress.gov
Updated September 20, 2024
Hezbollah (“Party of God,” also spelled Hizballah) is an Iran-backed Lebanese Shia militia and U.S.-designated Foreign Terrorist Organization (FTO). Hezbollah is an Iranian partner force, helping Tehran project power across the region, train allied militias (reportedly including Hamas), and threaten U.S. interests and allies across the region. Formed in the wake of the 1982 Israeli invasion of Lebanon, the group has conducted numerous attacks against Israeli and Western targets. In addition to authorizing sanctions against Hezbollah, Congress has sought to bolster Lebanese state institutions to counter its influence. Clashes between Hezbollah and Israel since the October 2023 Hamas-led attack on Israel have displaced tens of thousands on both sides of the border and escalated since July 2024, increasing the prospect of a broader military confrontation.
Figure 1. Lebanon
Source: Created by CRS. UNIFIL = United Nations Interim Force in Lebanon; UNDOF = United Nations Disengagement Observer Force.
Hezbollah’s leader is Hassan Nasrallah, who has served as Secretary-General since the assassination of his predecessor by the Israeli Defense Forces (IDF) in 1992. Some countries and the European Union (EU) separate Hezbollah’s military and political wings—designating the former for sanctions while maintaining dialogue with the latter. U.S. officials have described this division as a “false distinction,” and one not made by Hezbollah itself. Reports estimate that Hezbollah’s fighters number between 40,000
and 50,000 or more. That figure includes the Radwan Force, an elite unit trained to conduct special operations. Hezbollah’s arsenal of rockets, missiles, and drones is estimated at over 150,000.
For nearly two decades, Hezbollah’s stated objective was to drive IDF forces from southern Lebanon. Since the Israeli withdrawal in 2000, Hezbollah has used Israel’s remaining presence in the Sheb’a Farms and other disputed areas in the Lebanon-Syria-Israel tri-border region (see Figure 1) to justify ongoing violence against Israel—and its persistence as an armed militia outside the structure or purview of the Lebanese Armed Forces (LAF). Hezbollah is aligned with the ideology of Iran’s government and bolsters Iranian strategic objectives. The State Department’s 2022 Country Reports on Terrorism states that Iran provides Hezbollah with “most of its funding, training, weapons, and explosives, as well as political, diplomatic, monetary, and organizational aid.” The 2024 Annual Threat Assessment of the U.S. Intelligence Community (ATA) states that, “Hizballah seeks to limit U.S. influence in Lebanon and the broader Middle East,” goals it shares with the Iranian government. Hezbollah also operates a global criminal-financial network, with reported hubs in Africa and Latin America. A 2022 Europol report stated, “The network of collaborators built by Hezbollah in the EU is suspected of managing the transportation and distribution of illegal drugs into the EU, dealing with firearms trafficking and running professional money laundering operations.” Other reports highlight Hezbollah’s role in the trafficking of amphetamine-type stimulants, marketed as captagon, along the Syrian border.
Hezbollah has participated in Lebanese elections since 1992 and draws popular support from its vast network of schools, clinics, youth programs, and other social services. The group entered the cabinet for the first time in 2005 and has held one to three seats in each Lebanese government formed since then. Hezbollah has at times sought to block cabinet decisions, twice prompting the collapse of the government by withdrawing from the cabinet alongside its political allies. The group is part of the March 8 political coalition, which also includes the Free Patriotic Movement (Christian) and the Amal Movement (Shia). Hezbollah holds two seats in Lebanon’s caretaker government. Hezbollah did not gain additional parliamentary seats in the 2018 or 2022 legislative elections (it continues to hold 13 out of 128). However, since the expiration of President Michel Aoun’s term in October 2022, Hezbollah and its March 8 allies have obstructed efforts by parliament to elect a president by preventing the formation of a quorum and by casting blank ballots in parliamentary electoral sessions.
Lebanese Hezbollah
https://crsreports.congress.gov
Hezbollah is based in Lebanon and primarily operates in the Middle East, though it has conducted attacks elsewhere. Lebanon. According to U.S. government assessments, Hezbollah controls access to parts of Lebanon and operates inside the country with relative impunity. The group was implicated in the 2005 assassination of former Lebanese Prime Minister Rafik Hariri in a car bombing in downtown Beirut that also killed 21 others. U.N. Security Council Resolution 1701 (2006) directs the United Nations Interim Force in Lebanon (UNIFIL) to assist the Lebanese government in establishing an area “free of” non-state armed personnel between the Blue Line (Lebanon’s de facto border with Israel) and the Litani River. Hezbollah’s continued operation in this area is a major factor in ongoing clashes with Israel. Syria. Hezbollah has a long-standing relationship with the government of Syrian President Bashar al Asad, which facilitates the transit of weapons through Syria from Iran to Hezbollah. Hezbollah has played a key role in assisting pro- Asad forces during Syria’s civil war. Yemen. Hezbollah also provides weapons and training to Houthi militants in Yemen, and Hezbollah commanders have reportedly assisted the Houthi campaign against international shipping in the Red Sea.
Hezbollah has been linked to a series of terrorist attacks, including one in 2012 against Israeli tourists in Bulgaria and two in Argentina during the 1990s. Hezbollah attacks against U.S. personnel and facilities abroad include the truck bombing of the U.S. Embassy and Multinational Force barracks in Beirut in 1983 and the kidnapping of the Central Intelligence Agency chief of station in Beirut, who later died while held captive. Hezbollah leaders reportedly armed and trained Shia militias that carried out attacks on U.S. forces during their 2003-2011 deployment to Iraq. The 2024 ATA states that Hezbollah “maintains the capability to target U.S. persons and interests in the region, worldwide, and, to a lesser extent, in the United States.” In 2023 congressional testimony, FBI Director Christopher Wray stated, “FBI arrests in recent years also indicate that Hizballah has tried to seed operatives, establish infrastructure, and engage in spying here domestically— raising our concern that they may be contingency planning for future operations in the United States.” The Treasury Department reported in 2024 that Hezbollah “members and sympathizers have long been involved in an array of large-scale criminal schemes, including sophisticated money laundering, smuggling, and trafficking networks that have involved the U.S. financial system.” U.S. law criminalizes support for Hezbollah and authorizes a number of secondary sanctions against non-U.S. nationals who provide it with material support or facilitate financial transactions on its behalf. A 2022 study found that 19 individuals were charged in federal courts with providing material support to Hezbollah between 1997 and 2020, with dozens more Hezbollah-affiliated individuals charged with non-terrorism-related offenses.
Hezbollah, which fought a 34-day war with Israel in 2006, has fired thousands of projectiles into northern Israel since
October 2023 as part of its stated support for Hamas, prompting Israeli retaliatory strikes and raising fears of a broader escalation. Strikes and counterstrikes escalated in summer 2024, including a rocket attack attributed to Hezbollah that killed 12 young people in the Golan Heights in July, Israel’s killing of a senior Hezbollah commander in response, and preemptive Israeli airstrikes in Lebanon in August that blunted the effect of a major Hezbollah attack that was in retaliation for the commander’s death. More than 500 Lebanese and over 30 Israelis have reportedly been killed in various attacks. Israeli officials have threatened wider military action in Lebanon if Hezbollah’s fighters are not withdrawn north of the Litani. U.S. officials have sought to broker an arrangement that keeps Hezbollah back from the border in a way that mitigates the threat of an October 7-style attack and permits the roughly 60,000 evacuated Israelis to return to their homes in Israel’s north. On September 16, 2024, as Israel continued to shift forces to the north, the Israeli Defense Minister said “the only way left to ensure the return of Israel’s northern communities to their homes, will be via military action.” On September 17- 18, hundreds of pagers and other devices apparently ordered by Hezbollah exploded across Lebanon, killing dozens and injuring thousands in an unprecedented attack attributed to but not claimed by Israel. Some reports indicate that Israel may have set off the devices due to concerns that Hezbollah would otherwise discover the plot. Some current and former Israeli officials reportedly argue that Israel seeks to raise the cost to Hezbollah of continuing to fight in the absence of a Gaza cease-fire. Observers speculate on whether these incidents may be a prelude to an Israeli offensive into Lebanon. It is unclear how the September device attacks might have impacted Hezbollah’s military capabilities, internal cohesion, or strategic calculus; Nasrallah vowed to continue attacks “until the aggression on Gaza stops.” On September 20, an Israeli strike in Beirut reportedly targeted senior Radwan Force personnel.
Congress has passed several measures authorizing secondary sanctions against persons and entities that facilitate financial transactions for Hezbollah, including the Hizballah International Financing Prevention Act of 2015 (P.L. 114-102), as amended by the Hizballah International Financing Prevention Amendments Act of 2018 (P.L. 115- 272). In the 118th Congress, the House agreed to a resolution urging the EU to designate Hezbollah “in its entirety” as a terrorist organization (H.Res. 599). State Department officials have described the LAF as “an institutional counterweight to Hezbollah,” an assessment some observers dispute. Successive appropriations acts have prohibited the availability of funds for the LAF if it is “controlled” by a designated terrorist organization. In exercising oversight of U.S. security assistance to the LAF, some Members have raised questions about the possible diversion of U.S. funds to Hezbollah.
Clayton Thomas, Specialist in Middle Eastern Affairs Jim Zanotti, Specialist in Middle Eastern Affairs
IF10703
Lebanese Hezbollah
https://crsreports.congress.gov | IF10703 · VERSION 10 · UPDATED
This document was prepared by the Congressional Research Service (CRS). CRS serves as nonpartisan shared staff to congressional committees and Members of Congress. It operates solely at the behest of and under the direction of Congress. Information in a CRS Report should not be relied upon for purposes other than public understanding of information that has been provided by CRS to Members of Congress in connection with CRS’s institutional role. CRS Reports, as a work of the United States Government, are not subject to copyright protection in the United States. Any CRS Report may be reproduced and distributed in its entirety without permission from CRS. However, as a CRS Report may include copyrighted images or material from a third party, you may need to obtain the permission of the copyright holder if you wish to copy or otherwise use copyrighted material.