European NATO allies have agreed to buy American weapons for Ukraine amid waning U.S. pledges, raising hopes—and questions—about whether this will be enough to sustain Kyiv’s defense.

NATO has started coordinating regular deliveries of large weapons packages to Ukraine after the Netherlands said it would provide air defense equipment, ammunition and other military aid worth

The Netherlands said on Monday it will contribute 500 million euros ($578 million) to purchase U.S. military equipment for Ukraine, becoming the first NATO country to contribute to a new mechanism to supply Kyiv with American weapons.