OCTOBER 1, 2026
The Institute for the Study of War (ISW) and The Critical Threats Project (CTP) at the American Enterprise Institute are publishing updates Monday through Friday to provide analysis on the war with Iran and the broader Middle East. Weekday updates cover events from the past 24-hour period, whereas weekend updates are abbreviated and cover the Houthi-Saudi conflict and major breaking developments related to the war with Iran.
ANALYST NOTES
Data Cutoff: 2:00 PM ET
Researchers
Benjamin Schmida, Middle East Researcher
Adham Fattah, CTP Iran Analyst
Bailey Pasternak, Middle East Researcher
Nidal Morrison, Middle East Researcher
Katherine Wells, CTP Iran Analyst
Annika Ganzeveld, CTP Middle East Portfolio Manager
Key Takeaways
Houthi forces temporarily disrupted a section of the Yemeni government-aligned forces' primary ground line of communication (GLOC) between Taiz City and Aden City on October 1 as part of their effort to isolate Yemeni government-aligned forces in Taiz City.
The Houthi attack demonstrates the group's ability to render the wider GLOC inoperable, which could impose multiple dilemmas on Yemeni government-aligned forces. Houthi forces simultaneously continue to advance in northeastern and northwestern Taiz Governorate, which could further threaten the Taiz-Aden GLOC.
Iranian officials are likely threatening to attack US targets outside the Middle East to deter the United States from resuming military action against Iran. These threats follow US President Donald Trump's recent warning that the United States could resume military action against Iran after the US midterm elections in November.
A senior Iranian delegation comprised of individuals close to Iranian Supreme Leader Mojtaba Khamenei visited southern Lebanon on October 1. The delegation included Islamic Revolutionary Guard Corps (IRGC) officer Brigadier General Hossein Yekta, who has played a significant role in internal security activities and recruitment. His inclusion in the delegation is notable given Hezbollah's growing unpopularity in parts of southern Lebanon and its ongoing attempts to reconstitute its military capabilities.
Toplines
Houthi forces temporarily disrupted a section of the Yemeni government-aligned forces' primary ground line of communication (GLOC) between Taiz City and Aden City on October 1 as part of their effort to isolate Yemeni government-aligned forces in Taiz City. Houthi forces detonated an improvised explosive device (IED) on the Hijat al Abd road in al Muharraqah Village, Lahij Governorate, on October 1, which temporarily disrupted the main supply route (MSR) that connects Taiz City and Aden City, according to multiple Yemeni sources and geolocated imagery. [1] Two anti-Houthi Yemeni sources reported that Houthi forces infiltrated al Muharraqah and the nearby Najd al Bard area, detonated an IED on the Hijat al Abd road, and then withdrew after Yemeni government-aligned forces and local fighters repelled them. [2] The Houthis have consistently sought to sever the Taiz-Aden GLOC in recent weeks. Yemeni government-aligned forces repelled an attempted Houthi advance to capture a nearby section of the Hijat al Abd road on September 24, for example. [3]
The Houthi attack demonstrates the group's ability to render the wider GLOC inoperable. The Hijat al Abd road lies north of a second, longer MSR. The Houthi IED attack will likely force Yemeni government-aligned forces to temporarily rely solely on this longer southern MSR south of al Turbah while the northern MSR is repaired. Reliance on the southern MSR, as opposed to both the northern and southern MSRs, will likely temporarily constrain Yemeni government-aligned forces' resupply and reinforcement efforts amid heavy fighting across Taiz Governorate. Both the southern and northern MSRs connect to key intersections. Successful Houthi attacks on the intersections or parts of the GLOC where there are no feasible alternative routes would render the wider GLOC inoperable.
Assessed Control of Terrain in Taiz and Lahij Governorates
(As of October 1, 2026 at 2:00 PM ET)
Map Callouts:
Houthi forces advanced eastward toward Jabal Habashi from the Bani Baraki Village, Taiz Governorate.
Houthi forces advanced southwestward into al Salaf Village, which supports a broader Houthi offensive effort on the Samah axis.
Houthi forces detonated an improvised explosive device (IED) on the Hijat al Abd road in al Muharraqah Village, Lahij Governorate, on October 1, which temporarily disrupted a portion of the primary GLOC between Taiz City and Aden City.
Map Contributors: Daniel Mealie, David Schulert, Megan Ewert, Nathaniel Kramer, Carolyn Weinstein, Eliana Ornelas, Samuel McRee, Natalie Mesplay, James Thompson, Mikayla Green, Christopher Dayton, Brian Carter, Nick Carl, Annika Ganzeveld, Kelly Campa, Carolyn Moorman, Katherine Wells, Ria Reddy, Ben Rezaei, Ben Schmida, Nidal Morrison, Adham Fattah, Parker Hempel, William Doran, and Bailey Pasternak.
The Houthis do not have to capture or control the intersections to effectively sever the Taiz-Aden GLOC, because sustained Houthi fire on the intersections or other sections of the GLOC could make the route too dangerous to use. Houthi severance, capture, or effective control of the intersections would effectively encircle Yemeni government-aligned forces defending Taiz City, as the intersections are located on the sole GLOC through which government forces can resupply and reinforce forces in the city. A DC-based Yemeni analyst assessed on September 10 that alternative GLOCs through mountain routes present greater challenges for resupply and reinforcement efforts. [4] Long-term Houthi control of the Taiz-Aden GLOC would likely force Yemeni government-aligned forces in Taiz City to surrender or retreat. The Houthis' severance of the Taiz-Aden GLOC would impose multiple dilemmas on Yemeni government-aligned forces, such as improving the Houthis' ability to threaten the Yemeni government's capital in Aden City, as ISW-CTP has previously assessed. [5]
Houthi forces simultaneously continue to advance in northeastern and northwestern Taiz Governorate, which could further threaten the Taiz-Aden GLOC. Geolocated imagery on October 1 indicates that Houthi forces advanced southwestward into al Salaf Village, Samah District. [6] This advance supports a broader Houthi offensive effort on the Samah axis. This offensive could put further pressure on the Taiz-Aden GLOC, given that al Salaf is less than 10 kilometers northeast of the GLOC. Separate geolocated imagery on October 1 indicates that Houthi armored forces advanced eastward toward Jabal Habashi from the Bani Baraki Village, Taiz Governorate. [7] Bani Baraki lies approximately 15 kilometers west of the Taiz-Aden GLOC. The Houthi advances come amid reports from multiple Yemeni government-aligned sources of intensified fighting on multiple fronts in Taiz Governorate. [8] A Yemeni military source told Saudi media on October 1 that Yemeni government-aligned forces inflicted at least 80 casualties on Houthi fighters during fighting across several axes in Taiz Governorate. [9] ISW-CTP is unable to confirm these casualty figures.
Iranian officials are likely threatening to attack US targets outside the Middle East to deter the United States from resuming military action against Iran. Three senior Iranian officials and an "insider" familiar with discussions told Reuters on October 1 that Iranian decision-makers are reviewing plans to expand potential targets beyond US assets in the region to possibly countries outside the region if the United States renews strikes on Iran. [10] The sources' decision to reveal these plans to Western media and condition the potential expansion of targets on the resumption of US strikes indicates that the regime is very likely attempting to use these public threats to deter the United States from resuming military action against Iran. This report follows US President Donald Trump's recent warning that the United States could resume military action against Iran after the US midterm elections in November. [11] English-language regime media separately circulated comments from a senior Islamic Revolutionary Guards Corps (IRGC) Aerospace Force officer that Iran has developed the ability to hit moving targets with long-range ballistic missiles. [12] The regime's circulation of the officer's comments in English may be part of the regime's information operation to deter the United States from striking Iran. [13]
A senior Iranian delegation comprised of individuals close to Iranian Supreme Leader Mojtaba Khamenei visited southern Lebanon on October 1. [14] IRGC officer Brigadier General Hossein Yekta participated in the visit. Yekta, who served in the same battalion as Mojtaba during the Iran-Iraq War, is involved in IRGC recruitment and indoctrination activities. [15] Yekta has played a significant role in Iranian internal security activities. Yekta publicly expressed support for using lethal force against protesters during the regime's violent crackdown on the Winter 2025-2026 protests in Iran, for example. [16] The delegation also included Alireza Panahian, an ultra-hardline cleric who similarly served in the same battalion as Mojtaba during the Iran-Iraq War. [17]
The Iranian delegation's visit to Lebanon comes amid a time of unprecedented Hezbollah weakness. Hezbollah has lost numerous fighters, weapons, and infrastructure in southern Lebanon since it went to war with Israel in March 2026. [18] The group continues to lack experienced commanders and a charismatic leader, increasingly relying on Iranian guidance. [19] Hezbollah is also increasingly unpopular in southern Lebanon, where it has traditionally maintained strong support. [20] It is possible that this Iranian delegation traveled to Lebanon to support Hezbollah's ongoing reconstitution efforts. Yekta's background as a recruiter and an internal security official is notable given Hezbollah's unpopularity in parts of southern Lebanon and its ongoing attempts to reconstitute its military capabilities. [21]
US and Partner Military Operations
Nothing significant to report.
Iranian Strike Campaign
Assessed Iranian War Aims:
Secure international recognition of Iranian control over the Strait of Hormuz
Degrade the US ability and willingness to continue the war
Restore deterrence vis-à-vis the United States and its regional partners
Divide the United States and Israel from the Arab states
Nothing significant to report.
US-Iran Negotiations
Nothing significant to report.
Iranian Domestic Affairs
Iranian security forces clashed with fighters in Sistan and Baluchistan Province on September 30 and October 1, highlighting the ongoing threat that anti-regime militant groups pose to the regime. Regime media reported on September 30 that an unspecified number of gunmen killed a Law Enforcement Command (LEC) officer in Rask, Sistan and Baluchistan Province. [22] Regime media separately reported on October 1 that the IRGC Ground Forces killed six unidentified fighters and seized several explosive devices during a security operation in the Manzil-e Ab area in Zahedan, Sistan and Baluchistan Province. [23]
British Prime Minister Andy Burnham stated on September 30 that there are "strong indications that Iran played a part" in the incident at Royal Air Force (RAF) Fairford on September 27. [24] Sky News reported on October 1 that British police arrested a dual British-Iranian national in London on suspicion of preparing "terrorist acts" at RAF Fairford. [25] The Iranian Foreign Affairs Ministry called Burnham's comments "false accusations" and summoned the UK ambassador to Iran for consultations. [26]
Lebanon
Hezbollah is attempting to obtain assurances from the Syrian government that Syria will not interfere with Hezbollah's affairs while also likely attempting to undermine Lebanese government-Syrian relations. Hezbollah's success in these efforts would support Hezbollah's cross-border smuggling operations between Lebanon and Syria. Hezbollah and Syrian government officials secretly met in Turkey on an unspecified date in September, according to six unspecified US, Lebanese, and Syrian sources speaking to Reuters on October 1. [27] Neither the Lebanese government nor any party in the reported talks has commented on the meeting at the time of this writing. The Syrian delegation reportedly pledged to not intervene militarily in Lebanon to disarm Hezbollah, according to Reuters sources. [28] The Syrian delegation asked Hezbollah to stop conducting cross-border smuggling operations and supporting militant cells in Syria, to which Hezbollah did not agree. [29] Hezbollah reportedly pledged to "not interfere in Syria's affairs," however. [30] Hezbollah will almost certainly not accept Syria's demands because Hezbollah is actively attempting to reconstitute its military capabilities, in large part by smuggling weapons into Lebanon from Syria. [31] Hezbollah is also very likely training and equipping Syrian Assadist insurgents to prevent Syrian government forces from disrupting Hezbollah's military activities. [32]
Hezbollah is likely attempting to undermine Lebanese government-Syrian relations by participating in secret talks with the Syrian government, regardless of whether or not Hezbollah can receive assurances that Syria will not intervene in Hezbollah's affairs. The Lebanese government seeks to disarm Hezbollah, strip the group of the ability to conduct foreign policy on behalf of Lebanon, and remove Hezbollah and Iranian influence from Lebanon. [33] The Lebanese government has also worked to establish closer bilateral security ties with Syria in recent months, including cooperation and intelligence sharing on cross-border smuggling. [34] Hezbollah's meeting with Syrian officials treats Hezbollah as a legitimate Lebanese state actor, regardless of whether the Syrian government views Hezbollah in that way, which could negatively impact Lebanese government-Syrian relations. Hezbollah has an incentive to disrupt Lebanese government-Syrian relations, including border security cooperation, to sustain cross-border smuggling operations.
Iraq
Iraqi Prime Minister Ali al Zaydi formally announced on October 1 that Iranian-backed Iraqi militias must disarm by June 30, 2027. [35] This announcement follows Zaydi's recent trip to the UN General Assembly (UNGA), during which he discussed militia disarmament with US Secretary of State Marco Rubio on September 21. [36] Zaydi may have also discussed militia disarmament with Iranian President Masoud Pezeshkian during their September 23 meeting, given the Iranian regime's opposition to disarmament. [37] The new disarmament deadline is consistent with Zaydi's remarks to the New York Times (NYT) on September 21, during which he outlined a two-phase plan to disarm the militias by June 2027. [38] He stated at the time that the Iraqi federal government would release the plan's full details on September 30, but Iraqi Foreign Minister Fuad Hussein announced on September 30 that the Iraqi government will release a draft disarmament plan with "specific timeframes" in the "coming days." [39]
The Iraqi federal government's delay in releasing the full details of the disarmament plan suggests that it has yet to finalize a disarmament agreement with some Iranian-backed Iraqi militias. An informed source told Iraqi media on October 1 that an unspecified militia demanded the formation of a "new ministry" during recent negotiations with the Shia Coordination Framework committee tasked with negotiating with the militias, which indicates that the committee has not yet negotiated a final agreement. [40]
Some Iranian-backed Iraqi actors may pressure the Iraqi federal government to stop storing its oil sale revenue in a New York Federal Reserve account to limit US leverage over Iraqi economic and political affairs. The Central Bank of Iraq has managed an account at the New York Federal Reserve on behalf of the Iraqi Finance Ministry since 2003 that holds the Iraqi federal government's revenue from oil exports in US dollars. [41] Iranian-backed Iraqi militia Asaib Ahl al Haq's political wing, Sadiqoun, issued a statement on October 1 that implicitly criticized how the United States uses dollar shipments as a "pressure tactic" to influence Iraqi politics. [42] Iranian-backed Iraqi actors have previously called for an end to US "hegemony" over the Iraqi economy, but Sadiqoun's statement appears to mark the first time since 2023 that an Iranian-backed Iraqi militia specifically criticized US control over Iraq's oil revenues. [43] The United States has recently used its control over dollar shipments to pressure the Iraqi government to curb Iranian influence in Iraq and disarm Iranian-backed Iraqi militias. [44] The United States also fully withdrew its forces from Iraq on September 30, which was one of Iranian-backed Iraqi actors' primary objectives under their broader objective to remove US influence from Iraq. [45] Iranian-backed Iraqi actors may devote more energy toward pressuring the Iraqi government to reduce economic dependence on the United States following the US military withdrawal to further remove US influence from Iraq.
Arabian Peninsula
The Saudi-led coalition announced on October 1 that the Houthis conducted a drone attack targeting the Taibah power distribution station in Madinah in western Saudi Arabia on September 29. [46] The coalition said that the attack damaged one transformer but did not disrupt the wider electricity network. [47] Houthi media denied that the Houthis conducted the drone attack. [48] The attack on the power distribution station demonstrates the Houthis' willingness to target Saudi civilian infrastructure serving domestic electricity needs, which would mark an expansion beyond previous strikes that primarily focused on state oil infrastructure and Saudi military infrastructure. [49]
Saudi and Yemeni government-aligned forces continued to strike Houthi military and communications infrastructure in northwestern and southwestern Yemen. A Yemeni government-aligned airstrike targeted a Houthi ammunition depot in Al Talh, Saada Governorate, on September 30. [50] Houthi media reported several Saudi airstrikes on communications infrastructure in Saada Governorate on October 1. [51] These strikes may have been intended to degrade the Houthis' ability to attack Saudi Arabia given their concentration in northwestern Yemen. Houthi military spokesperson Brigadier General Yahya Saree claimed that Saudi forces conducted 47 airstrikes on October 1 that targeted communications and civilian infrastructure. [52] Likely Saudi airstrikes also targeted a Houthi ammunition depot in Mocha Port, Taiz Governorate, in southwestern Yemen on September 28, according to geolocated satellite imagery. [53]
Houthi Attacks in Saudi Arabia and Saudi and Yemeni Government-Aligned Forces Strikes in Yemen
(As of October 1, 2026 at 2:00 PM ET)
Map Callouts:
A Houthi drone struck the Taibah power distribution station in Madinah on September 29, according to the Saudi-led coalition.
Saudi and Yemeni government-aligned forces struck Houthi ammunition depots in al Talh on September 30 and Mokha on September 28.
Map Contributors: Daniel Mealie, David Schulert, Megan Ewert, Nathaniel Kramer, Carolyn Weinstein, Eliana Ornelas, Samuel McRee, Natalie Mesplay, James Thompson, Mikayla Green, Christopher Dayton, Brian Carter, Nick Carl, Annika Ganzeveld, Kelly Campa, Carolyn Moorman, Katherine Wells, Ria Reddy, Ben Rezaei, Ben Schmida, Nidal Morrison, Adham Fattah, Parker Hempel, William Doran, and Bailey Pasternak.
ENDNOTES
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