Regional Proxy Conflict Escalates as Iran's Network Activates Across the Middle East

Iran's regional proxy network — including Hezbollah in Lebanon, Houthi forces in Yemen, and Shia militias in Iraq — has escalated operations across the Middle East as the US-Iran conflict intensifies, opening multiple fronts in what is rapidly becoming the broadest military crisis in the region since the 1973 Arab-Israeli War. The activation of Iran's so-called Axis of Resistance marks a dangerous new phase in the conflict, transforming what began as a bilateral US-Iran confrontation into a sprawling, multi-theater war with no clear boundaries. NukeClock has moved 3 seconds closer to midnight as the conflict widens beyond a bilateral engagement and the risk of miscalculation multiplies with every new front.

The Axis of Resistance Activates

For decades, Iran has cultivated a network of allied non-state military groups across the Middle East — a strategy known as "forward defense." (For background on this concept, see our explainer: What Are Proxy Wars?) The doctrine is straightforward: fight adversaries far from Iranian soil using ideologically aligned proxy forces, imposing costs on enemies without exposing the Iranian homeland to direct retaliation. The IRGC Quds Force, under the late Qasem Soleimani and his successors, built this architecture into the most extensive state-sponsored proxy network in the modern world.

During the June 2025 Twelve-Day War between Israel and Iran, the Axis of Resistance notably stayed quiet. A detailed analysis by the Clingendael Institute found that proxy groups largely refrained from escalation during that conflict, suggesting a deliberate Iranian decision to keep the crisis contained. Hezbollah held fire. The Houthis limited their operations. Iraqi militias stayed on standby.

The difference now is existential. US strikes on Iranian soil — including the killing of Supreme Leader Khamenei — represent a direct threat to the survival of the Islamic Republic itself. When the regime's existence is at stake, the calculus changes fundamentally. The entire network has activated, and activated simultaneously.

Hezbollah's Northern Front

Lebanese Hezbollah — the crown jewel of Iran's proxy network — has launched sustained rocket barrages against northern Israeli cities, opening a second front that stretches Israel's military resources and air defense systems to their limits. Hezbollah's estimated arsenal of 130,000+ rockets and missiles, many of them precision-guided munitions capable of striking deep into Israeli territory, represents the most significant conventional threat Israel faces on any single border.

The rocket attacks have forced Israeli civilian evacuations from northern settlements, reprising and intensifying the displacement that occurred during the 2006 Lebanon War but at a far greater scale. Schools have closed across the Galilee. Haifa, Israel's third-largest city, has come under repeated fire.

For Israel, this represents the nightmare scenario defense planners have warned about for decades: a two-front war. With the Israeli Air Force committed to operations against Iran, Hezbollah's activation forces impossible resource allocation decisions. Every Iron Dome battery directed north is one fewer protecting against Iranian ballistic missiles from the east. Every squadron tasked with striking Hezbollah launchers in southern Lebanon is one not available for long-range strikes on Iranian nuclear infrastructure.

The border skirmishes have escalated beyond rocket exchanges. Ground-level incursions, anti-tank missile strikes on Israeli military positions, and tunnel infiltration attempts suggest Hezbollah is testing the perimeter for vulnerabilities — a prelude, some analysts fear, to a more ambitious ground operation.

Houthi Attacks in the Red Sea and Arabian Sea

Ansar Allah — the Houthi movement in Yemen — has intensified its anti-ship campaign in the Red Sea and Arabian Sea to levels far exceeding the 2024-2025 disruption that initially drew international attention. Anti-ship ballistic missiles, cruise missiles, and one-way attack drones have targeted commercial vessels transiting one of the world's most critical maritime corridors.

The Red Sea carries approximately 12% of global trade, including a significant share of Europe-Asia container traffic and energy shipments. The Houthi campaign has already forced major shipping lines to reroute around the Cape of Good Hope, adding weeks to transit times and billions in additional costs.

What makes the current situation uniquely dangerous is the compound effect with the Strait of Hormuz. Two of the world's most critical maritime chokepoints — the Red Sea's Bab el-Mandeb strait and the Persian Gulf's Strait of Hormuz — are now disrupted simultaneously. The economic consequences are cascading: energy prices have spiked, insurance premiums for Gulf-bound shipping have become prohibitive, and global supply chains face disruptions not seen since the COVID-19 pandemic.

The Houthis have demonstrated capabilities that surprised Western intelligence assessments — including the ability to target vessels with ballistic missiles at ranges exceeding 100 nautical miles and to coordinate multi-axis attacks combining drones, cruise missiles, and ballistic missiles in a single engagement. Their arsenal, supplied and upgraded by Iran over years of covert transfers, has matured into a genuine maritime denial capability.

Iraqi Militia Strikes on US Bases

In Iraq, Iranian-backed Shia militia groups — including Kata'ib Hezbollah, Asa'ib Ahl al-Haq, and Harakat Hezbollah al-Nujaba — have launched a sustained campaign of drone and rocket attacks against US military installations. Al Asad Air Base in Anbar Province and facilities near Erbil in the Kurdistan Region have been primary targets, with attacks occurring daily and sometimes multiple times per day.

The attacks compound the pressure from Iranian retaliatory strikes on US bases in the Persian Gulf, creating a situation where American forces face threats from both state and non-state actors across multiple countries simultaneously. Force protection requirements are consuming resources and attention that would otherwise support offensive operations against Iran.

The political dimension is equally volatile. The Iraqi government is caught between its relationship with the United States — which maintains a military presence in Iraq under a bilateral security framework — and its deep ties to Iran, which exerts enormous influence over Iraqi politics through the very militia groups now attacking US forces. Baghdad's attempts to mediate have gained no traction. The Iraqi parliament has seen renewed calls to expel US forces entirely, echoing the vote that followed the Soleimani assassination in 2020 but with far greater urgency.

The risk of US casualties on this front — in addition to those from direct Iranian strikes — creates domestic political pressure in Washington that could either accelerate escalation or, conversely, build momentum for withdrawal. As Al Jazeera reported, Trump has vowed to continue attacks on Iran while acknowledging that more US troops are "likely" to die.

Why Multi-Front Conflict Increases Nuclear Risk

Each new front in this conflict creates additional escalation pathways and multiplies the opportunities for miscalculation. This is not simply additive — it is exponential. The US military must now allocate finite resources across multiple theaters: the Persian Gulf, the Red Sea, Lebanon's border with Israel, Iraqi airspace, and potentially Syrian territory where Iranian forces maintain a presence.

Israel faces its own impossible calculus. Responding forcefully to Hezbollah's northern front could draw Israeli ground forces into Lebanon — a repeat of the 2006 quagmire — at precisely the moment when strategic focus on Iran is most critical. Not responding risks Hezbollah concluding that its attacks carry no consequences, inviting further escalation.

The fog of war deepens with every new actor. Communication channels between the US and Iran are already minimal. There are no communication channels whatsoever between the US and Houthi forces, between Israel and Iraqi militias, or between most of these actors and each other. When a drone from an unidentified origin strikes a ship in the Gulf, the attribution problem alone can trigger escalatory responses against the wrong target.

The historical parallel is uncomfortable but apt: World War I — where a cascade of alliance activations and mobilization timetables transformed a bilateral crisis between Austria-Hungary and Serbia into a continental and then global war within weeks. The dynamic of reciprocal escalation, where each party's defensive response is perceived as offensive action by the other, is the mechanism nuclear risk analysts fear most.

This is the scenario examined in our nuclear threat assessment — the compound risk pathway where no single event crosses the nuclear threshold, but the accumulation of crises degrades decision-making, compresses timelines, and increases the probability of catastrophic miscalculation.

Impact on the Clock

This event moved NukeClock 3 seconds closer to midnight. The assessment reflects several compounding risk factors:

• Multi-front conflicts exponentially increase the probability of miscalculation. With fighting across at least four theaters, the number of potential escalation triggers multiplies far beyond any single bilateral confrontation.
• Each proxy group operates with varying degrees of Iranian control, introducing additional variables that even Tehran cannot fully predict or manage. Hezbollah has significant operational autonomy. The Houthis make independent targeting decisions. Iraqi militias answer to multiple commanders with competing agendas.
• The combination of proxy war, Hormuz closure, and direct US-Iran strikes creates compound escalation pressure that exceeds the sum of its parts. Economic, military, and political crises are now reinforcing each other.
• Two critical maritime chokepoints — the Strait of Hormuz and the Red Sea's Bab el-Mandeb — are now disrupted simultaneously, threatening global energy supplies and trade flows in ways that could draw additional nations into the conflict.

What Happens Next

Several escalation pathways are now plausible within days, not weeks:

Israeli ground operation in Lebanon. Prime Minister Netanyahu has previously warned that a major Hezbollah escalation would trigger a ground incursion. With rocket attacks now hitting Haifa and other major cities, the political pressure for a decisive response is mounting. A ground operation would open a fifth theater and risk drawing in Syrian forces and additional Iranian advisors.

US/UK naval escalation against Houthi positions. The disruption of Red Sea shipping affects European and Asian economies directly, creating pressure for a broader coalition naval response beyond the existing Operation Prosperity Guardian. Strikes on Houthi launch sites in Yemen risk further destabilizing an already fragile country and drawing in regional actors including Saudi Arabia and the UAE.

Conflict expansion into Syria. Iranian military advisors, IRGC personnel, and allied militia groups maintain significant presence in Syria. If the US or Israel determines that Syrian territory is being used as a staging ground for attacks, strikes inside Syria become likely — adding yet another sovereign nation to the conflict map.

The ceasefire question. Perhaps the most consequential unknown is whether proxy forces would stop fighting if a ceasefire were reached between the US and Iran directly. Hezbollah, the Houthis, and Iraqi militias have their own institutional interests, local agendas, and operational momentum. A top-down ceasefire order from Tehran — even if such an order could be issued coherently from a decapitated leadership structure — might not be enough to stop fighting that has taken on a life of its own.