From Stockpile Reserves to Supply Chain Resilience: How Modern Conflicts Reshape Defense Procurement Systems

Event Overview

Over the past thirty-plus years, post-Cold War defense procurement has been based on the assumptions that the likelihood of major-power war is low and that technological change is controllable, focusing on maintaining readiness through peacetime stockpiles. However, recent conflicts such as the Russia-Ukraine war, crises in the Middle East, and tensions in the Indo-Pacific show that modern warfare consumes resources far faster than expected, while technologies like AI and autonomous systems iterate at an accelerating pace, rendering traditional procurement systems inadequate.

Global military spending has reached a historic high: according to data from the Stockholm International Peace Research Institute (SIPRI), global military expenditure in 2024 reached $2.718 trillion, a year-on-year increase of 9.4%—the largest increase since the end of the Cold War. The United States spent approximately $997 billion, China about $314 billion, the EU about €343 billion in 2024 (expected to rise to €381 billion in 2025), and Israel increased by about 65% to $46.5 billion.

Supply Chain Background

The defense industrial chain involves munitions, platforms, electronics, sensors, communication systems, etc., traditionally dominated by large prime contractors, with procurement cycles lasting years. The supply chain is characterized by concentration, long cycles, and heavy inventories. However, modern conflicts have seen a surge in demand for new capabilities such as drones, loitering munitions, and software-defined systems, while technology obsolescence accelerates, rendering the "stockpile for 20 years" model ineffective.

The defense industrial base is undergoing structural changes: for example, on the Ukrainian battlefield, new drone designs, software upgrades, and electronic warfare countermeasures are deployed within weeks or months, far surpassing traditional procurement frameworks. Venture capital has poured into the defense technology sector, with the scale of venture capital focused on defense, national security, and resilience technologies growing significantly over the past decade.

Enterprise Decision Logic

Governments and defense contractors face dual pressures: maintaining strategic reserves while enhancing rapid response capabilities. Decision logic shifts from "How much inventory do we have?" to "Can we quickly produce more?"

• Governments: Increase budgets, invest in scalable manufacturing capabilities, support startups, and build joint industrial resilience (e.g., shared inventories, multinational manufacturing programs).
• Defense Contractors: Traditional prime contractors need to adapt to rapid iteration models, while deep-tech startups gain contracts through capabilities in AI, autonomous systems, edge computing, etc.
• Investors: Focus on technology companies with civilian foundations (dual-use) to diversify risk.

Supply Chain Impact

Supplier Management - The traditional single-large-supplier model is shifting toward diversification and networking. Multinational joint manufacturing programs (e.g., NATO) promote interoperability standards and distributed production. - Suppliers must have the ability to rapidly scale production, with increased demands on delivery lead times and production flexibility.

Manufacturers - Manufacturing networks shift from efficiency priority to speed and resilience priority. Production lines must support rapid reconfiguration, e.g., ammunition lines quickly switching to new munitions. - Manufacturers of dual-use technologies (AI, robotics) gain strategic positions, with military and civilian supply chains converging.### Logistics Enterprises - Wartime logistics support demand surges, requiring high reliability, high frequency, and reconfigurable routes. Emergency airlift and sea-land intermodal networks need pre-positioned capacity. - Inventory management shifts from "mass stockpiling" to "dynamic replenishment," similar to agile commercial supply chains.

Procurement Systems - Procurement cycle compression: traditionally years are shortened to months or even weeks. Governments adopt flexible mechanisms like Other Transaction Agreements (OTAs). - Emphasis on modularity and upgradability, not fixed specifications. Procurement decisions must consider future technology update capabilities.

Inventory Systems - Strategic reserves remain necessary, but scale and categories are adjusted: focus on platforms that require long-term reliance and are hard to rapidly expand production (e.g., warships, fighter jets), while consumables (ammunition, drones) prioritize domestic production capacity. - Introduction of "digital inventory," i.e., key design drawings, software code, and rapid additive manufacturing capabilities, as virtual reserves.

Regional Impacts

Asia - China continues military modernization with a defense budget of approximately $314 billion (2024), while developing a domestic defense industrial base emphasizing self-reliance and controllability. - India, Japan, South Korea, etc., increase procurement budgets and strengthen supply chain collaboration with the U.S. and allies through friend-shoring. - South Korea becomes a major global arms exporter, leveraging its manufacturing capabilities to provide rapid delivery solutions.

Europe - EU defense spending increases by nearly two-thirds (2020-2024), with a focus on enhancing joint procurement and shared production capacity. For example, the European Defense Fund supports multinational munitions programs. - NATO emphasizes "joint resilience," establishing decentralized stockpiles and mutual supply agreements to reduce reliance on any single country's supply chain. - Baltic states invest in drone and counter-drone industries, leveraging startup ecosystems.

North America - U.S. defense budget is approximately $997 billion, focusing on next-generation technologies (AI, autonomous weapons, hypersonics) and promoting "national emergency" rapid expansion authorities. - Canada and Mexico participate in the U.S. defense supply chain through near-shoring agreements, but face labor and regulatory barriers.

Middle East - Israel's defense spending surges by 65%, focusing on developing indigenous defense technologies (e.g., Iron Dome, Iron Beam laser systems) and aerospace capabilities, while strengthening co-production with the U.S. - UAE and Saudi Arabia invest in domestic defense manufacturing to reduce import dependence and participate in international joint development (e.g., unmanned systems).

Latin America - Brazil leverages its industrial base to produce ammunition and small drones, but the overall supply chain is weak, relying on external key components. - Regional defense spending grows slowly, with more focus on peacekeeping and internal security; military supply chains have not yet undergone deep restructuring.

Africa - Most countries remain import-dependent, but regional conflicts (e.g., Sahel) drive demand for low-cost drones and surveillance capabilities. South Africa and others have some manufacturing base. - External powers (China, Russia, France) compete for defense cooperation, but local supply capacity improves slowly.

Future Trends (1-5 years)1. Manufacturing Capacity as a Strategic Asset: Countries will invest in rapidly scalable production lines, such as additive manufacturing, modular factories, and distributed production networks. Expansion of ammunition and drone production capacity becomes a priority. 2. Institutionalizing Joint Industrial Resilience: NATO and regional alliances will establish shared inventories, joint procurement, and common standards, forming a "defense supply chain community." 3. Dual-Use Technology Ecosystem Flourishes: Startups in AI, autonomous systems, semiconductors, quantum computing, etc., continue to receive military funding and venture capital, blurring the lines between defense and commercial technologies. 4. Dynamic Procurement and Agile Contracts: Governments adopt continuous iteration models similar to commercial software, shortening procurement cycles to months, focusing on system upgradability rather than one-time delivery. 5. Digital Transformation of Inventory Management: Digital twins and supply chain visibility tools become widespread, enabling real-time monitoring of inventory status and capacity bottlenecks, supporting predictive replenishment. 6. Resilience Metrics Included in Assessments: Supplier evaluations incorporate indicators such as production capacity flexibility, technology update speed, and cybersecurity; the "resilience" dimension in ESG gains attention. 7. Regional Supply Chain Rebalancing: Europe and Asia accelerate internal supply chain localization, while North America maintains its current structure but strengthens allied cooperation. The Middle East and Latin America attract some capacity relocation. 8. Cost and Resilience Trade-offs: Short-term procurement costs may rise (due to decentralization and redundancy), but are seen as necessary investments for long-term conflict endurance capabilities.