The United States paused weapons supplies to Ukraine, including critical air defense interceptors, artillery shells, missiles, and rockets. Western media outlets reported that sources stated on July 2 that the US pause on weapons supplies to Ukraine will affect dozens of PAC-3 interceptors for Patriot air defense systems, dozens of Stinger man-portable air defense systems, thousands of 155mm high explosive howitzer munitions, over 100 Hellfire air-to-ground missiles, over 250 Guided Multiple Launch Rocket System (GMLRS) rockets, dozens of grenade launchers, and dozens of AIM air-to-air missiles.[1] Familiar sources told Politico on July 1 that the United States decided in early June 2025 to withhold some of the aid that the United States promised Ukraine under the Biden administration but that the decision is only now taking effect.[2] Politico reported that the halted weapons come from two different streams of Biden administration-era support — weapons from drawdowns of current US stockpiles that the US Department of Defense (DoD) received money to replenish, and the Ukraine Security Assistance Initiative, in which the United States funds the purchase of weapons for Ukraine from US defense firms. White House Deputy Press Secretary Anna Kelly stated on July 1 that US authorities made the decision following a DoD review of US military support to states around the world.[3] Six defense officials, congressional officials, and other sources told NBC that the Pentagon ordered the pause after a review of US munitions stockpiles.[4] NBC’s defense and congressional sources stated that the United States could hold up the weapons flow to Ukraine until the assessment of US stockpiles is complete but that the United States could extend the pause of military assistance to Ukraine even longer if the weapons are in short supply or if the United States needs to supply them to other parts of the world.
The Ukrainian Ministry of Foreign Affairs (MFA) stated on July 2 that continued deliveries of previously allocated US defense packages are critically important, particularly in order to strengthen Ukraine’s air defense.[5] The Ukrainian MFA emphasized that any delay in supporting Ukraine’s defense capabilities will encourage Russia to continue its war — and not seek peace. The Ukrainian MFA stated that US-Ukrainian consultations about defense supplies are ongoing at all levels and that Ukraine will speak with the United States about finding mutually beneficial solutions to strengthen Ukraine’s defense capabilities.
The decision to suspend military aid to Ukraine will likely force Ukrainian forces to continue to husband materiel, although the exact timing of the planned deliveries that the United States paused remains unclear at this time. The Ukrainian Ministry of Defense (MoD) stated that Ukraine had not received any official notifications about any suspension or revision to the delivery schedules of the agreed US military aid prior to the US announcement.[6] The New York Times (NYT) reported that US officials stated that the United States had not scheduled to ship the affected munitions to Ukraine for several months, but the Wall Street Journal (WSJ) reported that US weapons shipments already in Poland were halted as of July 1.[7] A Trump administration official told Politico that the administration had not requested any further aid but that there is enough aid left over from the Biden administration to last Ukraine “several more months.”[8] The deputy commander of a Ukrainian battalion told the Washington Post in an article published on July 2, however, that Ukrainian forces already have to concentrate on holding positions and conserving resources rather than advancing.[9] Ukrainian forces have had to husband critical materiel, including air defense interceptors, GMLRS rockets, and artillery shells, during previous suspensions of US aid. Ukraine’s European partners are increasing their efforts to provide Ukraine with military assistance and the Ukrainian defense industrial base (DIB) continues its efforts to become self-sufficient, but only the United States can provide certain weapons systems at scale and quickly.[10]Ukrainian forces very likely will have to conserve materiel again should the United States continue to suspend weapons deliveries.
The suspension of US aid to Ukraine will likely accelerate Russian gains on the battlefield, as previous US aid suspensions have in the past. Delays in US military aid in Fall 2023 and Winter-Spring 2024 set conditions for Russian forces to make more accelerated battlefield gains than Russian forces had previously been able to make.[11] Russian forces significantly intensified offensive operations near Avdiivka, Donetsk Oblast in mid-January 2024 and concentrated significant manpower and materiel to their effort to seize the settlement in mid-February 2024 amid the protracted debate in the US (from October 2023 until April 2024) about passing supplemental aid for Ukraine. Ukrainian forces also faced significant artillery constraints during the Russian offensive against Avdiivka, allowing Russian forces to attack under less pressure from Ukrainian counterbattery fire. Russian forces sustained a high tempo of offensive operations after seizing Avdiivka in order to push as far west as possible, and Russian forces subsequently launched offensive operations in Spring 2024 intended to seize Pokrovsk when the suspension of US assistance was still greatly constraining Ukrainian materiel supplies.[12] ISW assesses that Russian forces advanced roughly three kilometers per day between the suspension of US aid to Ukraine on December 6, 2023 and the resumption of aid on April 24, 2024, much of which was in Donetsk Oblast — as compared to the six months prior to the December 2023 aid suspension when Russian forces actually lost a total of roughly 203 square kilometers at a rate of 1.1 square kilometers lost per day (due to Ukraine’s gains during the 2023 counteroffensive, which was enabled by the US and other allies surging military aid to Ukraine).
Key Takeaways:
- The United States paused weapons supplies to Ukraine, including critical air defense interceptors, artillery shells, missiles, and rockets.
- The decision to suspend military aid to Ukraine will likely force Ukrainian forces to continue to husband materiel, although the exact timing of the planned deliveries that the United States paused remains unclear at this time.
- The suspension of US aid to Ukraine will likely accelerate Russian gains on the battlefield, as previous US aid suspensions have in the past.
- The suspension of US aid to Ukraine will reinforce Russian President Vladimir Putin’s theory of victory that posits that Russia can win the war of attrition by making slow, creeping advances and outlasting Western support for Ukraine.
- Kremlin officials are responding to the US military aid suspension by publicly flouting Putin’s theory of military victory as successful — in direct opposition to US President Donald Trump’s stated goal of bringing Russia to the negotiating table and achieving a lasting and just peace.
- The Kremlin is also using the US aid suspension as a basis to continue rhetorical attacks against European defensive efforts that are in line with Trump’s initiative for Europe to shoulder more of the burden for collective defense.
- The US decision to suspend military aid to Ukraine will particularly degrade Ukraine’s ability to defend against Russia’s enhanced long-range missile and drone strike capabilities that have inflicted significant civilian casualties — in sharp contrast to President Trump’s stated objective of stopping civilian casualties in Ukraine.
- Ukrainian forces advanced in northern Sumy Oblast. Russian forces advanced in northern Kharkiv Oblast and near Toretsk and Novopavlivka.