Fact-Check: Did the Biden Administration Deplete U.S. Military Stockpiles?

The political debate over the readiness of the United States military has centered on a recurring accusation from President Donald Trump and his administration: that former President Joe Biden severely depleted American weapons stockpiles by arming Ukraine. Speaking to reporters aboard Air Force One in late July 2026, Trump dismissed concerns about current ammunition shortages in the Middle East, asserting that the U.S. has "plenty" of munitions but adding that he would like to have more. "Biden gave so much to Ukraine," Trump stated, claiming that when he left office in 2021, "the stockpiles were full." This narrative has been echoed by U.S. Ambassador to the United Nations Mike Waltz, who recently blamed the Biden administration for leaving the military in a "depleted situation."[1][5]

An examination of defense procurement data, recent combat expenditures, and independent analyses reveals a more complex reality. While it is true that the U.S. military is currently facing critical shortages in several high-end missile and interceptor categories, the primary driver of this immediate deficit is not the war in Ukraine, but rather the 38-day bombing campaign against Iran conducted under the Trump administration earlier in 2026. Furthermore, defense experts note that while aid to Ukraine did reduce reserves of certain ground-combat munitions, the Biden administration actually initiated a massive expansion of defense production to replenish those stocks before leaving office.[1][2][4]

To evaluate the claim that Ukraine aid emptied the U.S. arsenal, it is necessary to distinguish between different types of munitions. The weapons provided to Kyiv between 2022 and 2024 heavily featured artillery ammunition, specifically 155mm shells, as well as shoulder-fired Stinger anti-aircraft missiles and Javelin anti-tank systems. These transfers did indeed draw down U.S. reserves of those specific items, prompting the Pentagon to surge production lines. However, Ukraine was not the recipient of the Navy's Tomahawk Land Attack Missiles (TLAMs) or the Army's Terminal High Altitude Area Defense (THAAD) interceptors—the exact systems that are currently facing the most acute shortages.[1][2][3]

The current strain on the U.S. arsenal is overwhelmingly concentrated in advanced precision-strike and air-defense systems utilized during Operation Epic Fury, the recent U.S. conflict with Iran. According to a detailed May 2026 analysis by the Center for Strategic and International Studies (CSIS), U.S. forces launched more than 1,000 Tomahawk cruise missiles during the 39-day campaign. This expenditure vastly exceeded the military's historical procurement rates; over the past decade, the U.S. purchased an average of just 86 Tomahawks per year. The sheer volume of munitions fired in a little over a month effectively erased years of accumulated inventory.[2][4][6]

Air defense interceptors experienced a similar drawdown during the Iran conflict. CSIS estimates that the U.S. military fired up to 1,430 Patriot interceptors from a pre-war stockpile of approximately 2,330 units, representing a massive depletion of a critical defensive asset. Additionally, U.S. forces launched between 190 and 290 THAAD interceptors to shoot down incoming Iranian ballistic missiles and drones. Given that the initial global stockpile of THAAD interceptors was estimated at just 360 units, the campaign consumed a staggering percentage of the total American inventory.[4][6]

The claim that stockpiles were "full" at the end of the first Trump administration in 2021 also requires context. Defense analysts point out that procurement for systems like the Tomahawk had been kept artificially low for years due to budget constraints and shifting priorities. The production rate was hovering at fewer than 200 missiles annually, meaning the stockpile was already vulnerable to a sudden, high-intensity conflict. The vulnerability was a systemic issue spanning multiple administrations, rather than a sudden crisis engineered by a single president.[2][3]

Contrary to the assertion that the Biden administration neglected the industrial base, budget documents show a marked increase in munitions funding during Biden's tenure. The fiscal year 2024 defense budget request included an estimated $30.8 billion specifically for missiles and munitions, a figure that adjusted to over $32 billion in 2026 dollars. More importantly, the Biden Pentagon initiated major multi-year procurement deals designed to scale up production capacity for the exact systems now in high demand, including a framework to increase Standard Missile-6 production from 125 to over 500 per year, and to quadruple THAAD production.[2]

Despite these reindustrialization efforts, the reality of defense manufacturing is that money cannot instantly buy time. The CSIS report explicitly warns that the depleted inventories have created a "window of vulnerability" for a potential conflict in the Western Pacific, particularly regarding China. Defense Secretary Pete Hegseth recently acknowledged to lawmakers that rebuilding the stockpiles will take "months and years," depending on the specific weapon system, even as he touted private contractors investing in new plants to deliver weapons faster.[2][3][4]

The timeline for recovery is sobering. Based on current Department of Defense delivery projections, the Tomahawk missiles expended against Iran will not be fully replaced until late 2030 or 2031. This assumes a 34-month production lead time and requires manufacturer Raytheon to successfully ramp up its capacity to more than 1,000 missiles per year, a massive industrial undertaking. RTX, Raytheon's parent company, has pointed to billions of dollars in recent investments to expand facilities in Alabama and Arizona to meet this goal.[2][3][4][6]

For air defense systems, the recovery horizon is slightly closer but still years away. CSIS estimates that replacing the heavily used THAAD interceptors will take until the end of 2029. Replenishing the Patriot interceptor stockpile is projected to wrap up in mid-2029. To cope with the near-term shortfall, the Pentagon has reportedly been forced to re-sequence deliveries, prioritizing the immediate needs of the U.S. military over those of international allies and partners who had previously placed orders.[2][3]

This prioritization has already had global ripple effects, straining diplomatic and military relationships with key allies who rely on American defense manufacturing. For example, a planned delivery of 400 Tomahawk missiles to Japan may face significant delays as the Defense Department focuses on refilling its own silos, despite a Japanese destroyer recently completing the necessary technical modifications to carry the weapons. Australia and the Netherlands, which also purchased hundreds of the cruise missiles to bolster their own deterrence postures, may similarly find their delivery timelines stretched as the U.S. industrial base struggles to meet domestic demand.[2]

The uncertainty surrounding these projections remains high. The "green line" of maximum potential inventory growth modeled by defense analysts assumes that the defense industry will actually achieve the ambitious capacity targets set in recent framework agreements, that production will remain uninterrupted by supply chain shocks, and that no new conflicts will emerge to drain the newly produced missiles. If any of these variables falter, the window of vulnerability could extend well into the 2030s.[2]

Ultimately, the evidence indicates that while the U.S. military is indeed navigating a precarious period of depleted munitions, the political framing of the shortage is highly selective. The drawdown of 155mm artillery for Ukraine was a calculated policy choice by the Biden administration, which was paired with a massive expansion of domestic shell production. Conversely, the critical shortage of high-end naval and air-defense missiles is the direct, unavoidable mathematical consequence of the 2026 Iran War—a conflict that required the U.S. to expend years' worth of interceptors and cruise missiles in a matter of weeks.[1][4][6]