The Glass Backbone: Why the Army’s Logistics Will Break in the Next War - Modern War Institute

The Glass Backbone: Why the Army’s Logistics Will Break in the Next War

Jonathan Buckland | 06.03.26

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The United States Army spent the last two decades optimizing sustainment for permissive environments defined by uncontested supply lines, contractor support, and static forward operating bases. As the National Defense Strategy shifts toward strategic competition and multidomain operations, however, this efficiency-driven model has become a liability. In large-scale combat operations, victory will depend less on which force fields the most advanced weapons and more on which can sustain combat power under persistent attack. A lethal maneuver force without a survivable logistical backbone is simply a stationary target waiting to culminate.

The Weight of History: Lessons in Logistical Overreach

History provides stark, recurring warnings against neglecting the sustainment tail in favor of the combat teeth. A prime example is found in Operation Barbarossa, the German invasion of the Soviet Union in 1941. German mechanized formations shattered Soviet defenses and advanced hundreds of miles within weeks. Yet they rapidly outran their logistics network.

The German high command had planned for a short, decisive campaign. It failed to account for the immense distances, the lack of paved roads, and the mismatch in railway gauges that prevented German trains from utilizing Soviet rail lines without extensive modification. Despite unprecedented initial battlefield successes, the campaign inevitably faltered. Fuel, ammunition, winter clothing, and replacement parts failed to keep pace with the advancing Panzer groups.

The famous halt before Moscow in the winter of 1941 was not primarily a tactical defeat inflicted by the Red Army; it was a systemic failure in sustainment. The Wehrmacht’s operational brilliance was entirely nullified by its lack of strategic endurance. The lesson here is clear: Operational reach is strictly dictated by logistical and sustainment capacity. Modern armies, fixated on the speed and lethality of their own mechanized and aviation assets, risk repeating this exact error if they assume that supply will keep pace with the maneuver force.

Furthermore, the Army must unlearn the logistical lessons from Operations Desert Storm and Iraqi Freedom. In 1991, the US military spent six months building massive “iron mountains” of supplies in Saudi Arabia, completely unhindered by Iraqi interdiction. In 2003, while supply lines were stretched, US forces still enjoyed absolute air supremacy and electromagnetic dominance. In a future peer conflict, the US Army will not be granted a six-month, uncontested build-up phase, nor will it operate under friendly skies.

The Crucible of Ukraine: The Transparent Battlefield

If history provides the theory, the ongoing war in Ukraine offers a brutal contemporary lesson: Modern armies collapse when they run out of logistics, not when they run out of weapons. Pervasive sensing, precision fires, and inexpensive drone systems have effectively eliminated the traditional rear area. Sustainment nodes, convoys, and distribution routes are now persistently exposed to detection and attack, making survivability and dispersion prerequisites for operational endurance.

During the opening phase of the invasion, the forty-mile-long Russian convoy that stalled north of Kyiv in February 2022 demonstrated how fuel shortages, maintenance failures, and interdicted movement corridors can immobilize operational maneuver. Ukrainian forces bypassed armored spearheads to strike vulnerable fuel and support convoys, exposing the mechanized formations’ dependence on uninterrupted sustainment. Multiple Russian formations stalled not because they were tactically defeated, but because their logistical support collapsed.

As the conflict evolved into a war of attrition, the vulnerability of centralized logistics became even more pronounced. Long-range precision fires, particularly HIMARS, enabled Ukraine to systematically target Russian ammunition depots and rail hubs deep behind the front. Russia’s subsequent displacement of logistical nodes farther from the battlefield degraded both the speed and volume of artillery resupply, demonstrating how attacks on sustainment architecture can directly reduce combat effectiveness at the point of contact.

Core Vulnerabilities: Moving Bulk Class III and Class V at Scale

To understand the scope of the problem, one must examine the staggering consumption rates inherent to large-scale combat operations. The two most critical vulnerabilities in the current US Army sustainment architecture are the diminished capacity to move bulk Class III (fuel) and Class V (ammunition) at scale, and the overreliance on centralized, easily targetable infrastructure.

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