# How Do the Houthi Rebels Remain Unyielding Despite Heavy Air Campaigns and Billions in Western Arsenal?

> Despite facing relentless military interventions by Saudi Arabia, the US, and Israel, the Houthi rebels in Yemen continue to expand their footprint, threatening key global shipping routes.

**Type:** article · **Category:** World · **Published:** 2026-09-16 · **Source:** TrendKia
**Canonical:** https://trendkia.com/en/world/havai-hamalon-aura-arabon-ke-adhunika-hathiyaron-ke-bada-bhi-kaise-majabuta-hote-gae-houthi-vidrohi-32673 · **Language:** English
**Tags:** Houthi Rebels, Saudi Arabia, Yemen War, Red Sea, Global Trade, Iranian Missiles, Middle East Tension

For nearly a decade, the Houthi rebels in Yemen have been subjected to continuous military campaigns and intense aerial bombardments, yet their operational strength has only grown rather than diminished. Major military powers, including Saudi Arabia, the UAE, the US, the UK, and Israel, have launched large-scale airstrikes against Houthi strongholds at various times. Despite this immense military pressure, the Houthi rebels are currently expanding their presence near a critical global maritime trade route and successfully targeting key Saudi Arabian oil infrastructure. This resilience has left international security analysts wondering why billions of dollars in advanced weaponry and repeated air campaigns have failed to weaken the group.

 

## The Strategic Defensive Shield of Yemen's Rough Terrain

One of the primary factors behind the Houthis' survival is Yemen's challenging geography. The territory under Houthi control is vast and highly mountainous. Such rugged topography makes traditional warfare extremely difficult for conventional military forces. Houthi fighters exploit this terrain to their strategic advantage by dispersing their military infrastructure, missile launchers, and personnel over a wide area. This makes it virtually impossible for any single air campaign to dismantle their entire command structure. Furthermore, the Houthis utilize long-range weapons that can be easily hidden within deep mountain valleys and caves, allowing them to launch precise strikes across the border into Saudi Arabia's oil facilities. This geographical edge also enables them to remain a persistent threat to commercial shipping and oil tankers in the surrounding waters.

 

## Iranian Military Tech and the Local Assembly Network

The Houthis have accumulated a massive inventory of ballistic missiles, cruise missiles, and advanced drones. Most of these weapon systems bear a striking resemblance to Iranian designs, possessing a strike range capable of reaching deep into the Gulf countries and even Israel. To target commercial ships in the Red Sea, the Houthis have deployed advanced anti-ship missiles and explosive-laden sea drones, bringing one of the world's most critical maritime trade arteries under constant threat. Although Iran denies transferring weapons to the Houthis due to the UN arms embargo, numerous shipments carrying Iranian weapon components have been intercepted en route to Yemen. A detailed 2024 UN experts' report also documented extensive military and technical ties between the Houthis, Iran, and other regional proxy networks.

 

## A Massive Expansion in Combat Personnel

The growing power of the Houthis is also reflected in the scale of their mobilization. According to the 2024 UN experts' report, the group has successfully recruited approximately 3.5 lakh (350,000) fighters into its ranks. In comparison, their troop strength in 2015 stood at just about 30,000. This marks a massive, multi-fold increase in their active combat force over a decade. While the Houthis benefit greatly from Iranian technical assistance, they are capable of assembling and producing a large portion of their arsenal domestically. By manufacturing low-cost drones and precision missiles, they can target highly expensive and modern military installations at a fraction of the cost incurred by their adversaries.

 

## The Economic Asymmetry of Western Air Defense Systems

Saudi Arabia possesses state-of-the-art fighter jets and sophisticated air defense systems supplied by the US. During the conflict, Saudi forces have deployed these defensive systems against incoming aerial attacks originating from Houthi positions and other regional sources. However, the reliance on high-cost interceptor missiles is placing an unsustainable strain on Saudi Arabia's defense supply chains. Security analysts raise concerns about how long Saudi Arabia can sustain this costly defensive posture against persistent Houthi drone strikes and potential attacks from Iran-backed militias in Iraq. In the past, such militia groups were linked to a significant strike that forced the temporary shutdown of the critical East-West pipeline, vital for Saudi oil exports.

 

## A Decade of Saudi-Houthi Conflict

The direct military conflict between Saudi Arabia and the Houthis began in early 2015, shortly after the rebels seized control of Yemen's capital, Sanaa, along with major portions of the country's northern and central regions. Saudi Arabia entered the conflict fearing the establishment of a heavily armed, hostile Iranian ally right along its southern border. What followed was a seven-year campaign of relentless airstrikes led by the Saudi coalition, which resulted in significant civilian casualties. Although Yemen government forces and southern separatists fought on the ground to push back the rebels, the frontline remained largely deadlocked. The intense fighting eventually led to a UN-brokered ceasefire agreement in 2022.

 

## The Gaza War and the Red Sea Escalation

Following the outbreak of the Gaza war in late 2023, the Houthis initiated a series of maritime attacks on commercial shipping in the Red Sea, framing their actions as a blockade against Israel. In response, the US and the UK launched coordinated airstrikes against Houthi targets starting in January 2024. In the subsequent year, US President Donald Trump ordered an escalation of the aerial campaign. US military officials reported dropping approximately 2,000 weapons on more than 1,000 targets during this operation, with the cost of the US ordnance alone exceeding $750 million. Despite this heavy bombardment, the Houthis managed to shoot down seven US MQ-9 Reaper drones, with each drone valued at over $30 million. Additionally, a US F/A-18 fighter jet worth over $60 million slid off an aircraft carrier and was lost in the sea.

 

## US Bombardment Ceases as Israeli Confrontation Intensifies

After weeks of intense US-led airstrikes, the Houthis agreed to halt their attacks on US vessels, but they continued to launch missiles and drones toward Israel. This prompted Israel to execute retaliatory strikes against Houthi positions in 2025. These Israeli air strikes resulted in the deaths of several high-ranking Houthi officials, including their prime minister, and repeatedly targeted a strategic port under Houthi control. While the Houthis largely avoided direct involvement during the initial months of the broader Iran-Israel military escalation, they resumed active hostility in July by launching fresh attacks on Saudi Arabia and declaring a naval blockade on Saudi shipping.

 

## Why Air Superiority Alone Cannot Defeat the Houthis

Military experts emphasize that an air campaign alone is insufficient to decisively defeat any insurgent group. Recent global conflicts have demonstrated that securing territory requires cohesive ground forces capable of capturing and holding land. However, the anti-Houthi coalition in Yemen is deeply fragmented. The ground forces consist of Saudi-backed government loyalists and UAE-backed southern separatists who hold conflicting political goals. The UAE, once Saudi Arabia's primary military partner in the coalition, formally withdrew its forces from Yemen in 2019. These internal divisions erupted into open clashes between the allied factions as recently as January, severely undermining any unified military effort against the Houthis.

 

## Expert Perspectives on Houthi Strategy and Capabilities

According to Thomas Juneau, an expert on Yemen and Iran and a professor at the University of Ottawa, Iranian assistance is only one-half of the explanation for the Houthis' rise. He points out that the other half is the deep-seated weakness of their opponents. Juneau notes that Yemen's internationally recognized government remains highly divided, weak, disorganized, and corrupt, a state of administrative failure that the Houthis have consistently exploited to expand their territorial control.

 Similarly, Michael Knights, a military analyst who has studied the Houthis extensively and now serves as the head of research at the New York-based strategic advisory firm Horizon Engage, describes the Houthis as one of the most aggressive and committed groups within Iran's regional network. Knights points out that Iran has accelerated the Houthis' military capabilities at an unprecedented speed, stating that military skills that took Lebanese Hezbollah 20 years to acquire were mastered by the Houthis in just about 5 years.

 

## The Strategic Threat to the Bab-al-Mandeb Strait

In recent weeks, anti-Houthi ground forces have been forced to retreat from several key defensive lines, allowing Houthi fighters to advance toward the Bab-al-Mandeb Strait. This narrow maritime chokepoint, situated between the Red Sea and the Gulf of Aden, is a vital artery for global trade. Any prolonged disruption to shipping transit through this corridor could have immediate and severe consequences for international commerce and global energy markets. Consequently, the Houthi military advance is no longer just a localized Yemeni civil conflict, but a pressing threat to global economic security.

 

## Saudi Arabia's Reluctance Toward Ground Operations

Saudi Arabia remains highly cautious about launching another full-scale ground campaign in Yemen. A large-scale ground offensive would likely lead to a protracted war of attrition and risk substantial military casualties. Meanwhile, the US is occupied with its broader strategic standoff with Iran and wants to avoid committing ground troops to a conflict in Yemen. Although Saudi Arabia signed mutual defense agreements with Turkey and Pakistan last month, these pacts have not been activated. This inactivity has raised questions within diplomatic circles regarding the practical utility of these defense alliances.

 

## The Diplomatic Impasse

The Houthis have demanded that Saudi Arabia completely lift its air and naval blockade on Yemen as a condition for peace. However, Saudi Arabia views conceding to this demand as tantamount to admitting defeat in the decade-long conflict. Furthermore, lifting the blockade would make it significantly easier for Iran to supply the Houthis with advanced military hardware, posing a direct threat to Saudi national security. Professor Thomas Juneau observes that unless the wider geopolitical tensions between the US and Iran are resolved, the prospects for a lasting diplomatic breakthrough between Saudi Arabia and Iran remain highly limited, with the Houthis showing no willingness to compromise on their core demands.

 Ultimately, the Houthis' resilience is the result of multiple factors: a highly protective mountainous geography, a massive increase in active combatants, access to low-cost missile and drone assembly, and strategic backing from Iran. When contrasted with the internal fragmentation of their opponents and the administrative weakness of the official Yemeni government, it becomes clear why relying solely on high-tech air campaigns has failed to neutralize the Houthi threat.

## What this means for you
The growing influence of the Houthis in Yemen and their moves toward the Red Sea could directly impact global shipping costs and oil prices.

- **Across India:** Disruptions in maritime routes can raise freight charges for Indian exporters, potentially increasing the cost of imported goods and crude oil in the domestic market.

- **Global Trade:** Houthi advances near the Bab-al-Mandeb Strait could force international shipping vessels to take longer, more expensive routes, triggering inflation in consumer goods worldwide.

- **In Saudi Arabia:** Continuous threats to Saudi oil facilities and transit pipelines could disrupt regional oil exports and impact economic stability.

## Why this happened
The continuous rise of the Houthi rebels is driven by a combination of challenging geography, strategic military support from Iran, and deep divisions among their local opponents in Yemen.

- **Geographical Shield:** Yemen's mountainous terrain provides the Houthis with natural protection, making it extremely difficult to target and destroy their missile and drone launch sites through airstrikes.

- **Iranian Military Technology:** Access to advanced drone and missile designs from Iran has allowed the Houthis to build a sophisticated and highly destructive asymmetric arsenal.

- **Friction Among Opponents:** The internationally recognized government of Yemen is weak and divided, and the local factions backed by Saudi Arabia and the UAE often clash with each other rather than presenting a united front.

## Questions & Answers

### 1. How large is the Houthi rebel fighting force?
According to a 2024 UN report, the Houthi fighting force has expanded to approximately 3.5 lakh (350,000) active personnel, up from just 30,000 in 2015.

### 2. How much has the US military campaign against the Houthis cost?
The US spent over $750 million on weapons dropped during its air campaign, though the Houthis still managed to shoot down several expensive US MQ-9 Reaper drones.

### 3. Why is the Bab-al-Mandeb Strait so important?
The Bab-al-Mandeb Strait is a strategic chokepoint connecting the Red Sea to the Gulf of Aden, serving as a vital channel for global energy and cargo shipping.

### 4. Why does Saudi Arabia avoid a direct ground invasion in Yemen?
Saudi Arabia fears that a full-scale ground operation would lead to a protracted war of attrition and result in high casualties among its troops.

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