Introduction

The world's most advanced weapons systems depend on materials that most people have never heard of—gallium, germanium, antimony, rare earth elements, tungsten, and a handful of other minerals that are essential for everything from jet engines to missile guidance systems to satellite communications. And for nearly all of these materials, the global supply chain runs through one country: China. China controls approximately 60 percent of global rare earth mining and roughly 90 percent of rare earth refining capacity (IEA, 2025). This dominance, built over three decades of strategic investment, has become one of the most potent economic weapons in Beijing's arsenal.

In the past two years, China has moved from theoretical leverage to active weaponization of its mineral dominance. A series of escalating export controls has demonstrated both the willingness and the capability to restrict access to materials that the U.S. defense industrial base cannot produce domestically. For defense supply chain professionals, this is not a distant geopolitical abstraction—it is an immediate and growing threat to the ability to build and maintain the weapon systems that national security depends on.

The Escalation Timeline

China's weaponization of critical minerals has followed a deliberate escalation pattern, each step increasing the scope and severity of export restrictions:

December 2024: China imposed an outright ban on exports of gallium, germanium, and antimony to the United States (Georgetown CSET, 2024). This was the first direct targeting of mineral exports at a specific country and represented a significant escalation from earlier licensing requirements. Gallium is essential for semiconductors and electronic warfare systems. Germanium is used in infrared optics and fiber optics. Antimony is a key component in ammunition, flame retardants, and military-grade batteries.

April 2025: China expanded its export control regime to cover rare earth elements and rare earth magnets, adding licensing requirements that gave Beijing discretionary authority over every export (CSIS, 2025). Rare earth magnets are critical components in precision-guided munitions, electric vehicle motors, wind turbines, and military electronics. The addition of processing technologies to the control list was particularly significant, as it restricted the transfer of refining know-how that other countries need to build independent processing capacity.

October 2025: China introduced extraterritorial provisions to its export control regime, asserting authority over rare earth materials and products even after they leave Chinese territory (White & Case, 2025). Under these provisions, products containing Chinese-origin rare earths could not be re-exported to certain destinations without Chinese government approval. This extended Beijing's control beyond its borders, potentially disrupting supply chains that route Chinese materials through third countries.

November 2025: As part of a broader trade truce, China suspended some critical mineral export curbs to the United States (CNBC, 2025). But the suspension was partial, temporary, and revocable—a demonstration that Beijing could turn the tap on and off at will. The message was clear: access to critical minerals is now a bargaining chip in broader geopolitical negotiations.

Why These Materials Matter for Defense

The strategic significance of critical minerals in defense applications cannot be overstated. These materials are not interchangeable commodities—they have unique physical properties that make them irreplaceable in specific applications:

Rare Earth Elements

The 17 rare earth elements are essential for some of the most sophisticated military technologies. Neodymium and samarium are used to make the powerful permanent magnets found in precision-guided munitions, electric motors in military vehicles, and actuators in aircraft flight control systems. Europium and yttrium are used in display technologies and laser systems. Cerium is used in catalytic converters and glass polishing for optical systems. Without reliable access to rare earths, the production of advanced guided weapons, military electronics, and aircraft components would be directly threatened.

Gallium and Germanium

Gallium is the foundation of gallium arsenide and gallium nitride semiconductors used in radar systems, electronic warfare equipment, satellite communications, and 5G military networks. China produces approximately 99 percent of the world's refined gallium (CSIS, 2025). Germanium is used in infrared optics for night vision systems, thermal imaging, and missile seekers. It is also critical for fiber optic communications systems. The December 2024 ban on these materials to the United States directly threatens production of some of the most important military electronics systems.

Antimony

Antimony is less well known but equally critical. It is used in ammunition primers, tracer rounds, night vision goggles, infrared sensors, and as a hardening agent in lead alloys used in military applications. China produces approximately 50 percent of the world's antimony (CSIS, 2025). The December 2024 export ban created immediate supply concerns for ammunition manufacturers and electronics producers.

Tungsten and Cobalt

Tungsten is used in armor-piercing ammunition, radiation shielding, and high-temperature applications in jet engines. Cobalt is essential for superalloys in jet engine turbine blades and for rechargeable batteries in military applications. While China's dominance in tungsten and cobalt is less absolute than in rare earths, its market share is sufficient to cause serious disruption if exports are restricted.

The Market Impact

China's export controls have already had measurable market effects. Gallium prices more than doubled in 2024 following the initial restrictions, while antimony prices surged to record levels (Nikkei Asia, 2024). These price spikes flow directly through to defense procurement costs, increasing the price of everything from ammunition to advanced electronics.

But price increases are only part of the story. More concerning is the uncertainty that export controls introduce into supply chain planning. Defense contractors cannot commit to production schedules when they cannot guarantee access to essential materials. Procurement timelines stretch as companies seek alternative sources or build strategic reserves. And the risk premium on materials subject to Chinese export controls raises costs even when the materials are physically available.

The market impact extends beyond the directly controlled materials. When China restricts one material, buyers of related materials begin stockpiling out of fear that restrictions will expand. This hoarding behavior amplifies price spikes and creates artificial shortages that compound the effects of the original restriction. The cascade effect can disrupt supply chains for materials that China has not even targeted.

The U.S. Response: Rebuilding Domestic Capacity

The United States has recognized the critical minerals vulnerability and is investing in rebuilding domestic and allied production capacity. However, the scale of the challenge is enormous, and closing the gap with China will take years or decades:

Defense Production Act Investments

The Department of Defense has used Defense Production Act Title III authorities to invest in domestic critical minerals production. Notable investments include $94.1 million to E-VAC Magnetics to expand domestic production of samarium-cobalt magnets used in missile systems and military electronics (DoD, 2024). This investment aims to create a domestic source for magnets that are currently sourced primarily from China.

The DoD has also invested in upstream mining capacity, including a $90 million award to Albemarle for lithium production at the only active lithium mine in the United States, located in North Carolina (Albemarle, 2023). Lithium is essential for military battery applications, from soldier-carried electronics to electric military vehicles.

National Defense Stockpile

The National Defense Stockpile, managed by the Defense Logistics Agency, holds approximately $1.3 billion in strategic materials (GAO, 2024). Congress has authorized additional funding to expand the stockpile, focusing on materials most vulnerable to supply disruption. However, the stockpile is designed to bridge short-term disruptions, not to sustain long-term supply independence. A protracted conflict that disrupted Chinese mineral exports for years would eventually exhaust stockpile reserves.

Allied Supply Chain Development

The United States is working with allies to develop alternative supply chains outside Chinese control. Australia, Canada, and several African nations have significant rare earth deposits that could be developed into producing mines. Japan and the European Union are investing in rare earth recycling technologies that could reduce primary mineral demand. The Minerals Security Partnership, launched in 2022, coordinates allied efforts to develop critical mineral supply chains.

But these efforts face a fundamental challenge: time. China's dominance was not built overnight—it was the result of three decades of sustained investment, technology development, and strategic patience. Replicating even a portion of China's mineral processing capacity in the West will require similar sustained commitment.

The Mining Timeline Problem

Perhaps the most sobering aspect of the critical minerals challenge is the timeline for developing new sources. A new mine in the United States takes an average of 10 to 15 years from discovery to production, encompassing exploration, environmental review, permitting, financing, construction, and commissioning (S&P Global, 2024). This timeline makes the United States one of the slowest countries in the world for mine development, a consequence of complex regulatory processes and frequent legal challenges.

Even after a mine is operational, building the downstream processing capacity to convert raw ore into usable materials is an additional multi-year effort. Rare earth processing, in particular, involves complex hydrometallurgical and solvent extraction processes that require specialized equipment, trained personnel, and environmental management capabilities. China has spent decades perfecting these processes, and replicating that expertise from scratch is a significant undertaking.

The Department of Energy's critical materials assessment identifies 12 materials as critical to U.S. energy and national security (DOE, 2023). For most of these materials, current domestic production is negligible compared to demand, and the timeline for achieving meaningful domestic supply is measured in decades, not years.

This timeline mismatch—between the urgency of the geopolitical threat and the pace of domestic supply development—is the central challenge of the critical minerals problem. The threat is now. The solution, if pursued through new mining and processing alone, is a decade or more away.

What Defense Supply Chain Leaders Must Do Now

While government and industry work to build long-term supply alternatives, defense companies must take immediate steps to manage the critical minerals risk:

• Map mineral dependencies: Identify every critical mineral in your supply chain, determine the country of origin, and assess the risk of supply disruption. Many companies are surprised to discover how deeply their supply chains depend on Chinese-origin materials, even when their direct suppliers are domestic companies.
• Build strategic reserves: For materials with high disruption risk and long replacement timelines, consider building strategic inventory buffers. The cost of carrying additional inventory is a fraction of the cost of production shutdowns when materials are unavailable.
• Qualify alternative sources: Begin the process of qualifying non-Chinese sources for critical materials. This may require changes to material specifications, testing and certification of new materials, and engagement with emerging suppliers in allied nations.
• Invest in recycling and recovery: Urban mining—recovering critical minerals from end-of-life products and manufacturing waste—can provide a meaningful supplement to primary production. Investing in recycling technologies and processes can reduce dependence on primary mineral imports.
• Monitor the regulatory landscape: China's export control regime is evolving rapidly. Companies must monitor regulatory developments and have contingency plans ready to activate when new restrictions are announced.
• Explore material substitution: Research into alternative materials that can replace critical minerals in specific applications is accelerating. While substitution is not possible for all applications, selective material substitution can reduce overall dependence on the most vulnerable supply chains.

A Pause Is Not a Solution

China's critical minerals dominance represents one of the most significant strategic vulnerabilities in the U.S. defense supply chain. The escalating pattern of export controls over the past two years has demonstrated that Beijing is willing to use this leverage as a geopolitical weapon, and the breadth of materials under Chinese control means that the threat extends across virtually every major defense program.

The United States and its allies are taking action to rebuild critical mineral supply chains, but the timelines for developing new mines, processing facilities, and refining capacity are measured in years and decades. In the interim, the defense industrial base faces a period of heightened vulnerability in which supply disruptions could directly impact the production and maintenance of weapon systems.

For defense supply chain professionals, the critical minerals challenge demands immediate attention and sustained action. Mapping dependencies, building reserves, qualifying alternatives, and monitoring the evolving regulatory landscape are not optional activities—they are essential elements of supply chain risk management in an era when the materials that build weapons have themselves become weapons.

The minerals that make modern defense possible are finite, concentrated, and increasingly contested. How the United States responds to this reality will shape the defense industrial base—and national security—for a generation.