Human Rights Watch is asking the US Congress to block Türkiye from transferring tens of thousands of decades-old cluster munitions to Ukraine. The State Department had earlier told Congress it is prepared to authorize the deal, which Ukraine wants to strengthen its firepower against the Russian invasion. 

What Türkiye wants to send

Türkiye has requested US permission to retransfer to Ukraine tens of thousands of cluster munition rockets, missiles, and artillery shells held in its stockpiles for decades. The package covers Türkiye's entire inventory of 12 M270 rocket launchers and three types of cluster munitions: 70 M39 ATACMS ballistic missiles, 2,524 M26 rockets, and 47,000 M509A1 203mm artillery shells, according to the State Department transmittal sheets.

The deal is valued at $256 million. Together, the rounds hold more than 10 million explosive bomblets, Human Rights Watch said, produced in part by Türkiye under US licenses first issued in 1987. The US removed the M509A1 shells from service in 1994, when the howitzers that fired them retired, according to HRW.

Cluster munitions scatter small bomblets across a wide area, and some fail to explode on impact, leaving hazards that can maim civilians long after fighting ends.

Ukraine, for its part, gave Washington written assurances not to fire earlier US-supplied cluster rounds in civilian-populated urban areas, and US officials said Kyiv had kept to its use constraints.

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What Washington says

A senior State Department official notified Congress that it is prepared to authorize the transfer, in documents printed in the Congressional Record on 6 August. Türkiye wants to shed older stock and focus its money on modern systems, the official said. Ukraine wants the munitions to bolster its fire support as it resists the invasion, the official added, noting that Ukraine already fields the same or nearly identical rounds. Congress can review the deal and pass a resolution of disapproval to block it.

Human Rights Watch argues the age and unreliability of the weapons make them a foreseeable hazard to civilians. Human Rights Watch deputy Washington director Nicole Widdersheim said the more-than-30-year-old munitions are inaccurate and prone to failure, and that their impact on civilians drove 112 countries to ban the weapon under the Convention on Cluster Munitions.

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The same group has documented Russia's cluster attacks since 2022

Human Rights Watch opposes the weapon for all sides and has tracked Russia's use of it throughout the war. It documented repeated Russian cluster strikes since 2022, called a Russian attack on Lyman a possible war crime, and logged further strikes on civilians in its World Report chapters on Ukraine.

In each case, the group called on Russia to stop firing the weapon. On the Türkiye deal, it is asking Congress for something more concrete — to kill the transfer before the munitions reach Ukraine.

Ukraine has agreed to buy a batch of American-made ballistic missiles and rocket launchers from Türkiye, according to Militarnyi. The weapons sit in Turkish stockpiles and still need to clear a routine US review before they ship.

Ukraine's deep strikes run on a scarce, politically gated supply of Western missiles, which it burns through faster than allies' resupply.

What Ukraine is buying

US government paperwork lists 70 M39 ATACMS (Army Tactical Missile System) missiles and 12 M270 rocket launchers, plus tens of thousands of cluster munitions. The M270 is a tracked launcher that fires guided rockets and ATACMS, the heavier sibling of the wheeled HIMARS.

The cluster load adds 2,524 M26 rockets for the M270 launchers and 47,000 M509A1 shells for Ukraine's 2S7 Pion and M110 guns. Both scatter bomblets over a wide area. The deal surfaced in US State Department notifications in the US Congressional Record for 6 August 2026. Türkiye wants to shed older weapons and fund newer systems, the filings say. The shipment moves through Turkish, Bulgarian, and American exporters.

How the sale clears Washington

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Because these are US-origin weapons, Washington must sign off first. The filings note that US law forces the State Department to notify Congress once major equipment tops $14 million, or other articles and services top $50 million. There is no approval vote: if neither chamber blocks the sale within 15 days, US consent takes effect automatically. Both chambers sit in recess past that deadline — the House until 31 August 2026, the Senate until 14 September 2026.

What the M39 ATACMS is

The M39 is the original production model of ATACMS, flying about 165 kilometers, or roughly 103 miles—shorter than later versions Ukraine has fired. It steers by laser gyroscopes with no GPS correction, which makes it less precise. Instead, it carries a 560-kilogram cluster warhead of 950 M74 submunitions built to hit troops, unarmored vehicles, and air defenses.

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How Ukraine uses ATACMS

Ukraine has fired ATACMS at Russian command posts, ammunition depots, and air defenses across occupied land and inside Russia. Even occasional launches force Russia to shift air defenses back from the front, easing pressure on Ukrainian troops. That firepower had gone quiet. Ukraine ran through its US-supplied ATACMS months ago, and US approvals came slowly. Buying 70 more through Türkiye lets Ukraine rebuild without waiting on fresh US aid.