Engines of War: Why the Automotive Sector Is the Fastest to Pivot to Military Production

Modern patterns of armed conflict are shifting from time-limited operations reliant on advanced, low-volume technologies to protracted confrontations driven by industrial attrition and the large-scale deployment of autonomous systems. This transition exposes critical deficiencies in the traditional defence industrial base's production capacity. As munitions stockpiles decline amid ongoing conflicts in Eastern Europe and the Middle East, military assessments increasingly identify manufacturing capability, supply chain resilience, and the speed of industrial mobilisation as decisive factors in strategic competition, alongside technological innovation.

In response to these dynamics, national security institutions are moving to reactivate historically grounded models that integrate the commercial manufacturing sector into military production. This approach was notably deployed during the Second World War, when Ford Motor Company redirected its civilian production lines to manufacture bombers, Chrysler Corporation established dedicated facilities for tank production, and General Motors allocated its industrial capacity to the production of aircraft engines and munitions.

The current operational environment demands a sustained supply of conventional mechanical platforms and expendable systems, including unmanned aerial vehicles and sensor-equipped tactical vehicles. As battlefield requirements increasingly outpace the production capacity of defence manufacturers, the automotive sector emerges as a uniquely positioned industrial base, combining large-scale output with advanced mechanical engineering capabilities. This reality necessitates a focused assessment of the structural and technical attributes that make it the most viable sector for rapid conversion to support military production.

Defence planners must rigorously assess which civilian industries offer the most viable conversion pathways when seeking to expand capacity and  reinforce the defence industrial base. The strategic turn towards leveraging the commercial sector rests on five interlinked pillars, which collectively drive governments to integrate automotive manufacturers into defence production structures.

The first pillar lies in a production scale that specialised defence industries cannot match. Dedicated defence manufacturers are structured to produce in limited quantities, with profitability anchored in per-unit margins rather than total output. By contrast, civilian automotive companies manufacture millions of units annually, with supply chains and workforce structures engineered to sustain continuous, flexible production at scale. In attritional conflicts, systems that meet acceptable quality thresholds and are produced in large volumes confer a decisive strategic advantage over superior platforms delivered in insufficient quantities. This dynamic underscores the battlefield value of the automotive sector’s mass-production capacity.

The second pillar rests on engineering convergence and the shared foundations underpinning precision manufacturing. The automotive and defence sectors draw on closely aligned core competencies. A worker trained in automotive production, for example, in welding high-strength steel alloys and assembling passenger safety cells, possesses fundamental technical skills that transfer directly to the assembly of armoured personnel carriers or the manufacture of munitions.

The third pillar centres on the decisive advantage of speed inherent in industrial conversion. In periods of conflict, time becomes the most critical strategic resource. The planning and construction of a new weapons facility require years to secure capital investment, obtain environmental approvals, and complete construction. By contrast, an existing automotive plant can be repurposed for military production within a significantly shorter timeframe, leveraging established physical infrastructure, energy networks, and logistical systems already in place.

The fourth pillar reflects an economic alignment that delivers essential support to both the state and the private sector. Defence contracts provide stable and predictable revenue streams for civilian manufacturers facing economic downturns or weakened consumer demand. This conversion pathway preserves specialised manufacturing jobs and mitigates the risk of plant closures that could trigger political and economic disruption. At the same time, leveraging existing civilian infrastructure reduces the capital expenditure required to finance entirely new state-run arsenals, generating substantial savings for the public purse.

The fifth pillar encompasses the political economy of comprehensive industrial mobilisation. Sustaining a prolonged war effort requires broad national participation and the consolidation of a unified societal commitment. Military institutions cannot prosecute industrial-scale conflicts through reliance on a narrow, isolated defence sector. By incorporating automotive manufacturers, the state expands its industrial base, confers institutional legitimacy on mobilisation efforts, and distributes the economic returns generated by defence spending across the full span of the domestic supply chain.

Modern global economies host a wide range of large-scale commercial manufacturing sectors, including consumer electronics, home appliances, telecommunications equipment, and specialised technologies. Yet the automotive industry remains the unequivocal first choice in defence mobilisation planning. This strategic preference reflects a convergence of technical compatibility, economies of scale, established physical infrastructure, and the underlying engineering and physical principles that govern vehicle manufacturing.

Assessing Alternative Industrial Sectors

The automotive sector occupies a uniquely strategic position, affording it preferential advantages in scale, quality control, and supply chain management. This assessment comes as the Pentagon continues its engagement with the commercial aviation and electronics industries.

The commercial aviation sector exhibits the highest degree of technological overlap with military aerospace. However, reliance on this sector to deliver rapid, additional capacity constitutes a strategic miscalculation, as it is already constrained by severe limitations on its effective production output. The world’s top 100 aerospace and defence companies generated a record $922 billion in revenue in 2024, driven by surging global demand for commercial air travel. Yet actual production volumes in commercial aviation continue to fall significantly short of meeting that demand.

The commercial aviation sector exhibits the highest degree of technological overlap with military aerospace. However, reliance on this sector to deliver rapid, additional capacity constitutes a strategic miscalculation, as it is already constrained by severe limitations on its effective production output. The world’s top 100 aerospace and defence companies generated a record $922 billion in revenue in 2024, driven by surging global demand for commercial air travel. Yet actual production volumes in commercial aviation continue to fall significantly short of meeting that demand.

By contrast, the consumer electronics industry operates at unprecedented production speeds, spans global markets, and benefits from advanced software capabilities. However, it remains ill-suited for direct conversion to military manufacturing due to its limited capacity to withstand harsh operational environments. Consumer-grade electronic components are designed for short life cycles, typically two to three years, and are engineered to function exclusively under controlled, moderate-temperature conditions.

Consumer electronics typically do not meet the stringent environmental stress standards required of military systems or automotive components, including resilience to high humidity and accelerated mechanical stress. A failure in a consumer-grade microchip may result only in the disruption of a software application, whereas a comparable malfunction in a missile guidance system or an autonomous military vehicle constitutes a critical operational failure. While the consumer electronics industry can supply foundational subcomponents to the defence sector, its manufacturing facilities and quality assurance cultures remain fundamentally unsuited to the assembly of robust, high-endurance combat platforms.

The automotive sector plays a decisive role in bridging this industrial gap, as vehicle design integrates the precision of mass production characteristic of consumer electronics with the durability of mechanical systems and the stringent safety standards associated with heavy aerospace engineering. Contemporary automotive manufacturers possess advanced capabilities in managing complex, multi-tier global supply chains and demonstrate particular expertise in applying mechatronic design principles, enabling the seamless integration of mechanical systems, thermal management, power electronics, and software-defined networks.

The automotive sector is undergoing a systemic shift towards software-defined vehicles, with manufacturers consolidating zonal computing architectures that enable over-the-air updates, advanced connectivity, and the integration of artificial intelligence. This technological evolution in the commercial market closely mirrors the exacting requirements of autonomous military platforms. The sector’s established mastery of robotics, advanced materials, and precision manufacturing positions it as a critical and viable partner, capable of supporting major defence contractors in redesigning and producing unmanned ground vehicles, loitering munitions, and mobile air defence nodes at a fraction of the cost of traditional approaches.

Ministries of defence are increasingly turning to automotive manufacturers to supply advanced autonomous driving systems, while also tasking them with mass-producing essential kinetic consumables. This shift coincides with a sharp depletion of global weapons stockpiles. The manufacturing techniques embedded within the automotive sector align closely with the requirements for producing large-calibre munitions, specialised cartridge casings, and precision fuses.

The provision of 155 mm artillery shells has emerged as the most urgent requirement in contemporary attritional warfare. Automotive component suppliers possess the technical capabilities to address this strategic shortfall, as heavy machinery used in forming vehicle parts can be efficiently retooled to manufacture shell casings. Advanced processes such as deep metal forming and heavy machining are recalibrated to produce steel shell bodies. In contrast, under normal conditions, these same processes are used to manufacture fuel tanks, engine blocks, or the structural frames of commercial vehicles. This operational shift is already underway across Europe.

Rheinmetall is converting its facility in Pierburg, Germany, to mass-produce steel artillery shell bodies. The plant, originally dedicated to manufacturing automotive components and engine pumps, is being repurposed to address acute production shortfalls and surging demand. In parallel, Motor Jikov is negotiating strategic partnerships to leverage its existing metal-casting infrastructure to produce hundreds of thousands of cast-iron artillery shell casings annually.

The mass production of small-arms ammunition and medium-calibre autocannon rounds fundamentally depends on high-speed, continuous drawing processes applied to copper and steel. Deep drawing is classified as a cold metal-forming technique in which flat metal sheets are forced into dies under intense pressure, progressively shaping them into smooth, hollow cylinders.

Automotive manufacturers deploy deep metal forming techniques extensively across assembly lines to produce precision components, robust airbag housings, and high-tolerance suspension bushings. By replacing commercial dies with tooling calibrated to military-grade standards, automotive forming plants can bypass the need to construct entirely new munitions facilities. This adaptation enables an immediate increase in the production of ammunition casings with precise geometric specifications, required structural integrity, and exceptional repeatability.

Modern munitions require integrating complex, high-reliability mechanisms to ensure precise arming and detonation upon target engagement. The production of fuses, safety devices, and primers demands ultra-precise manufacturing processes with near-zero tolerance for error. Automotive manufacturers possess extensive, accumulated expertise in the precision machining of safety-critical mechanical components, including airbag deployment triggers, engine control units, and fuel injection systems.

Computer-controlled advanced manufacturing techniques, mechatronic assembly lines, and the rigorous quality assurance methodologies embedded within automotive supply chains align closely with military requirements for the production of fuses and sensor systems. This technical compatibility enables commercial facilities to manufacture and assemble complex, high-reliability triggering mechanisms, which are essential to the effective functioning of both basic artillery shells and advanced guided missiles.

The profound structural transformation underway in the global automotive industry, marked by the transition from internal combustion engine manufacturing to electric vehicle production, constitutes a critical variable in defence mobilisation calculations. This technological shift creates significant opportunities for enhanced military integration while simultaneously introducing serious strategic vulnerabilities. Electric vehicle architectures are particularly well-suited to the operational requirements of military robotics systems.

The shift towards electric mobility is fundamentally reshaping automotive production models, replacing conventional drivetrains with flat, modular platforms built around adaptable architectures. Defence manufacturers can repurpose these flat platforms, integrating battery packs and electric motors to create silent, high-torque operational bases for unmanned ground vehicles and logistics carriers. Moreover, the growing reliance on power electronics and advanced software in electric vehicles aligns closely with military efforts to develop networked platforms supported by artificial intelligence systems.

This transformation, however, exposes deep strategic vulnerabilities related to supply chain sovereignty and security. Electric vehicle battery supply chains are highly complex, requiring the extraction and provision of vast quantities of critical minerals such as lithium, cobalt, and nickel, followed by intensive refining and assembly processes. These global supply routes are currently dominated by competing geopolitical powers. In response, economic and security legislation seeks to onshore battery supply chain activities within allied geographies, yet achieving full independence from external sources remains a distant strategic objective.

The practical implementation of industrial conversion projects faces a range of technical, organisational, and structural constraints. Logistical and engineering barriers challenge historical assumptions that civilian factories can be rapidly and seamlessly converted to military production. Repurposing automotive production lines extends far beyond software adjustments, requiring the dismantling and reconstruction of civilian facilities with weapon-specific machinery. Commercial equipment, in its standard configuration, is largely unsuitable for wartime manufacturing, with only a very limited proportion historically proving viable for military use without substantial modification.

Military equipment requirements differ fundamentally from those of commercial vehicles, necessitating specialised armour-grade steel and dedicated heat-treatment facilities that are not available in civilian plants. Conversion, therefore, demands substantial capital investment and the suspension of commercial production for extended periods. Delaying retooling efforts until the onset of conflict constitutes a significant strategic risk, as modern weapons systems and cyber operations sharply compress available response times.

A shortage of skilled labour further constrains efforts to expand defence manufacturing, as military production demands specialised technical competencies that differ from the largely automated workflows of the automotive sector. Current training pipelines are insufficient to supply qualified personnel, necessitating the retraining of workers to perform complex tasks such as ballistic armour welding. Bridging this gap requires reorienting in-house automotive training systems to meet stringent military specifications, a process that is both time-intensive and resource-intensive.

The stringent regulatory environment of the defence sector imposes significant administrative barriers on automotive suppliers. Government agencies require comprehensive security clearances, subject firms to lengthy qualification processes, and enforce strict export control regimes. These protracted procedures, coupled with repeated testing protocols, introduce delays that impede the rapid mobilisation of commercial capabilities to meet military demand.

Globalisation and the deep interdependence of supply chains represent the most critical challenge to contemporary mobilisation strategies. By embedding manufacturing capabilities within complex international networks, globalisation has weakened domestic supply chains through increasing reliance on external imports. Final assembly capacity within factories loses its strategic value if the flow of essential imported components, such as semiconductors and batteries, is disrupted. This reality compels mobilisation strategies to move beyond reliance on major industrial brands, reinforcing the imperative to prioritise industrial reshoring and the securitisation of deep supply chains to ensure the sustainability of wartime production.

The contribution of automotive manufacturers remains confined to specific segments of military production. The provision of interceptor missiles for US air defence systems, such as the Patriot missile system and THAAD, stands out as the most formidable challenge confronting joint industrial mobilisation efforts. The planning trajectory of Volkswagen illustrates this operational reality: the company is assessing the production of heavy trucks, launch platforms, and dedicated power generators for the Iron Dome, while explicitly excluding the manufacture of the missiles themselves from its scope.

Expanding the automotive sector’s role in the production of munitions and defence components represents an enabling pathway that strengthens output. Still, it does not offer a comprehensive solution to the shortage of interceptor missiles. Government-led initiatives in the United States (U.S.), alongside ongoing engagement with European firms, are designed to harness the sector’s large-scale manufacturing capacity, complex supply chains, and rigorous quality control systems. These advantages are being directed to reinforce, rather than replace, traditional defence contractors.

The principal constraint on expanding production of interceptor munitions lies in the use of sensitive technological components, including rocket motors, warheads, sensor systems, and advanced software. Specialised defence firms retain near-exclusive control over these technologies, and their rapid transfer to the civilian industrial base is neither feasible nor advisable given the associated security risks and regulatory complexities. The political viability of this strategic pathway ultimately depends on policymakers recognising the operational role of civilian industry: to expand the industrial base and compress the timeline for scaling production from five to seven years to approximately two to three years.

Bipartisan Policy Center. The Defense Production Act: National Security as a Potential Driver of Domestic Manufacturing Investment. Washington, DC: Bipartisan Policy Center, February 2024. PDF. Accessed April 13, 2026. https://bipartisanpolicy.org/wp-content/uploads/2024/02/The-Defense-Production-Act-National-Security-as-a-Potential-Driver-of-Domestic-Manufacturing-Investment.pdf.

Butzel Long. “President Trump Invokes Defense Production Act Authority: How Could That Affect the Auto Industry?” Client alert, 2020. Accessed April 18, 2026. https://www.butzel.com/alert-Defense-Production-Act-The-Manufacturing-Impact.

Cancian, Mark F. “Putting the Industrial Base on a Wartime Footing.” Center for Strategic and International Studies, 2023. Accessed April 14, 2026. https://www.csis.org/analysis/putting-industrial-base-wartime-footing.

Cancian, Mark F., and Becca Wasser. “From Production Lines to Front Lines: Revitalizing the U.S. Defense Industrial Base.” Center for a New American Security, 2024. Accessed April 15, 2026. https://www.cnas.org/publications/reports/from-production-lines-to-front-lines.

Chuck Anderson Ford. “Ford Motor Company in Wartime: A Century of Service, Innovation and Grit.” Dealership blog, December 21, 2025. Accessed April 13, 2026. https://www.chuckandersonford.com/blog/2025/december/21/ford-motor-company-in-wartime-a-century-of-service-innovation-and-grit.htm.

CMS Law. “From Automotive to Defence: Why Industrial Transition Is Becoming a Business Reality.” CMS Automotive Outlook 2026. Accessed April 14, 2026. https://cms.law/en/deu/publication/cms-automotive-outlook-2026/from-automotive-to-defence-why-industrial-transition-is-becoming-a-business-reality.

Inbar, Efraim. “The Shift in Technological Innovation from the Defense Sector to the Civilian Sector.” Begin–Sadat Center for Strategic Studies, BESA Center Perspectives Paper, 2020. Accessed April 14, 2026. https://besacenter.org/the-shift-in-technological-innovation-from-the-defense-sector-to-the-civilian-sector/.

Rollings, Tyler. “Civilian Manufacturing and National Defense: Strategic Planning for Globalization’s Challenges.” Master’s thesis, Missouri State University, 2019. PDF, BearWorks. Accessed April 14, 2026. https://bearworks.missouristate.edu/cgi/viewcontent.cgi?article=5156&context=theses.

South Florida Reporter. “Pentagon Recruits Detroit: A New Industrial Mobilization for Global Security.” South Florida Reporter, 2026. Accessed April 14, 2026. https://southfloridareporter.com/pentagon-recruits-detroit-a-new-industrial-mobilization-for-global-security/.

Tadjdeh, Yasmin. “Industrial Base Could Struggle to Surge Production in Wartime.” National Defense Magazine, January 24, 2020. Accessed April 15, 2026. https://www.nationaldefensemagazine.org/articles/2020/1/24/industrial-base-could-struggle-to-surge-production-in-wartime.

TRT World. “Why Is US Going Back to World War II Era, Approaching Automakers to Make Weapons?” TRTWorld.com, 2026. Accessed April 14, 2026. https://www.trtworld.com/article/81676d188d8c/amp.

U.S. Department of War. “During WWII, Industries Transitioned from Peacetime to Wartime Production.” War.gov, feature story, 2020. Accessed April 14, 2026. https://www.war.gov/News/Feature-Stories/story/Article/2128446/during-wwii-industries-transitioned-from-peacetime-to-wartime-production/.