The Drone Supply Chain War: Identifying the Chokepoints to Making a Drone

Every drone involved in the war in Ukraine depends on China. From palm-sized quadcopters guiding artillery to long-range loitering munitions, nearly every unmanned system on both sides contains materials and components that originate in Chinese factories and refineries. Carbon fiber, rare-earth magnets, lithium-ion cells, and gallium-nitride chips are critical nodes in the Chinese supply chain underpinning the architecture of modern drone warfare.

Most policymakers and military leaders tend to focus on higher-order hardware and software, from airframes to autonomy, AI, and ethics, but miss the underlying chemistry and metallurgy. The ability to sustain mass production of drones requires access to specialized composites, alloys, and semiconductors. In this sense, supply chain competition translates into a geopolitical battle for the raw materials needed to employ drones at scale.

Over recent decades, the United States and many allies shed capacity in mining, refining, manufacturing, and advanced fabrication. The result is a defense industrial base deeply entangled with adversary-controlled supply chains. China’s increased imposition of global export controls on defense-related minerals and rare earths underscores how easily these dependencies can be weaponized. Unless the United States adapts quickly, warfighting capacity could be hamstrung by a shortage of specialized materials needed to build affordable mass.

This challenge will only grow. As future warfighting requires a wider array of drones across air, land, and maritime domains, securing the supply chains that enable their production may determine success in a crisis. The material dependency of a modern military drone reveals five strategic vulnerabilities in structural materials, propulsion, power (batteries), sensors (semiconductors), and logistics. Mitigating these vulnerabilities before an adversary can disrupt material flows has become essential for U.S. and allied readiness.

The Fragile Foundations of Drone Production: Five Strategic Risks

Each of the four material categories and the logistics chain that binds them together reveals a weak link. Together, they expose how industrial dependence has become a strategic vulnerability. These vulnerabilities concentrate in five material and component domains that determine the ability to surge drone production.

1. Structural Materials: Carbon Fiber, Aluminum-Lithium, and Titanium
   
   Carbon fiber reinforced polymer is the skeletal foundation of most unmanned aircraft. The high-strength fibers are spun from a polyacrylonitrile precursor, produced mainly in Japan, the United States, and China. Global output in 2025 was nearly 150,000 metric tons and may triple by 2030, but aerospace-grade fiber capacity remains limited to a few firms and autoclave facilities. The primary risk is time. Carbon fiber production cannot be surged. Disruption would constrain production, slow reconstitution, and ripple across every composite-dependent aircraft program.
   
   Metal aircraft structures are dominated by aluminum-lithium and specialized titanium (Ti-6Al-4V). Aluminum-lithium enables longer wings and greater fuel and munition margins. Over half the titanium used in aerospace applications is used for hard points, fasteners, landing gear components, and hot and erosive zones.
2. Propulsion: Magnets, Copper, and Engine Alloys
   
   Neodymium-iron-boron magnets turn electrical current into lift and torque. Each small motor contains roughly 5–15 grams of these magnets, which can scale to tons across entire drone fleets. The U.S. Department of Commerce reports that about 90 percent of global sintered-magnet output still occurs in China. Even when rare-earth oxides are mined elsewhere, magnetization and finishing remain largely Chinese. Magnetization and finishing remain concentrated in China because environmental and capital costs pushed these steps offshore two decades ago. The risk is geography; a single export restriction could disrupt both commercial and military drone production.
   
   When it comes to bigger drones, their powerplants rely on aluminum-silicon-copper piston alloys—and also steel or titanium valvetrain parts, and magnesium castings in some housings to save weight.
3. Batteries: Lithium-Ion Cells, Copper, Graphite, and Gallium-Nitride Electronics
   
   Energy storage defines drone endurance limits. Each kilowatt-hour of battery capacity requires between 0.5–1 kilogram of copper, aluminum, and graphite, plus tens to hundreds of grams of lithium, nickel, cobalt, or manganese. Refining, not mining, is the choke point. China processes roughly two-thirds of the world’s lithium and more than seventy percent of its graphite anode material. The risk, again, is geography. Even a modest export control, such as Beijing’s 2023 graphite restrictions, could disrupt drone assembly within weeks.
   
   Market shifts also stress the supply chain as lithium-iron-phosphate batteries are becoming more preferred for energy storage, not nickel or cobalt, causing a shift in upstream metal demand.
4. Semiconductors and Sensors: Gallium-Nitride Amplifiers, Indium Antimonide, and Mercury Cadmium Telluride.
   
   The “brains” and “eyes” of drones rely on gallium-nitride power amplifiers and infrared detectors made from indium antimonide and mercury cadmium telluride. These specialty semiconductors are produced in a handful of Western fabrication facilities that require years to expand. Moreover, flight controllers, navigation systems, and datalinks depend on specialized semiconductors. The risk is complexity. Scaling surveillance and targeting fleets will stretch an industrial base that cannot easily grow or absorb export shocks.
5. Logistics and Integration: The Neglected Risk
   
   Composites, magnets, batteries, and semiconductors converge at the final assembly line, after their subcomponents cross multiple borders. The Department of Defense (recently renamed the Department of War) still lacks visibility below the prime-contractor level for many critical suppliers. Moreover, lighter and more effective munitions for a drone are also a focus, which means sourcing propellants and energetic materials to maximize lethality at the lowest weight. In wartime, when attrition drives rapid replacement, losing a single precursor chemical or magnet alloy can halt production across an entire class of drones. The risk is opacity. What cannot be traced cannot be protected.
    

Redefining Deterrence Through Industrial Resilience

Composites, magnets, batteries, semiconductors, and logistics for fielding a drone point to a simple truth in modern warfare: Industrial resilience is combat power. Reliance on drones for joint warfighting is moot if the carbon fiber stops flowing, the magnets are embargoed, or the raw materials for batteries are unrefined. The war in Ukraine shows that drone warfare scales not through innovation alone, but through manufacturing capacity built on secure material inputs, rarely of which can be easily substituted or surged.

Closing these vulnerabilities requires a shift in how the United States views industrial power as an element of national defense. Four steps can close this gap between technological ambition and industrial fragility.

The Department of War cannot defend what it cannot see. The Pentagon still lacks supply chain visibility below its tier-one contractors. Without traceability, a “Made in America” label on a drone means nothing if its motor magnets or battery foils originate in China. A national database linking defense acquisition programs to their critical material origins would expose vulnerabilities before crises do.

Second, redundancy must replace efficiency. Efficiency made supply chains global; deterrence now requires redundancy to make them resilient. The United States should expand coproduction with allies and partners that already lead in critical minerals and advanced materials, such as Australia for rare earths, Japan and South Korea for carbon fiber, and Canada for graphite and lithium refining. A distributed network of allied fabrication and finishing plants would shield drone production from single-country shocks. The Five Eyes model for intelligence sharing could become a Five Materials model for defense industry cooperation.

Third, stockpiles must shift from weapons to raw material inputs. Traditional strategic reserves focus on oil and ammunition. In a drone-saturated battlefield, the material chokepoint is upstream of manufacturing. Modest government or consortium-managed reserves of rare-earth magnets, carbon-fiber prepregs, and lithium-ion precursors could buffer production against export restrictions or surging wartime demand. These reserves need not be vast, just sufficient to buy time and capacity when it matters most.

Finally, resilience must become a doctrine to inform how the United States plans to mobilize and sustain its warfighters. The next war will not be won by who initially fields the most drones, but by who sustains building them at scale. The industrial dimension of airpower is now measured in kilograms of carbon fiber, grams of gallium, and milligrams of indium. A resilient drone supply chain is as strategic as any stealth program or artificial intelligence algorithm. Supply chain security is a foundational pillar of American deterrence.

Future U.S. warfighting will not hinge on algorithms or autonomous weapons, but on control of the materials that make mass possible. If the United States and its allies can secure the fibers, alloys, and semiconductors that power unmanned systems, they will remain resilient in a crisis. Deterrence demands resilient domestic and allied supply chains, especially as drones become central to joint warfighting. If the United States and its partners harden these supply chains now, deterrence will hold. If not, a single foreign factory could become a single point of failure.

Macdonald Amoah is a communications associate at the Payne Institute for Public Policy, where he researches topics bordering on critical minerals and general mining issues. Morgan D. Bazilian is a senior associate (non-resident) with the Energy Security and Climate Change Program at the Center for Strategic and International Studies (CSIS) in Washington, D.C. Lt. Col. Jahara “FRANKY” Matisek is a U.S. Air Force command pilot, nonresident research fellow at the U.S. Naval War College and the Payne Institute for Public Policy, and a visiting scholar at Northwestern University. Col. Katrina Schweiker is a U.S. Air Force physicist and a military fellow with the Defense and Security Department at CSIS.