Washington's suspension of military assistance will not lead to a sudden collapse of Ukraine's defensive lines, but it could have a real impact on the war within months, undermining air defences and precision strike capabilities in particular.

Hours after the U.S. suspended military aid for Ukraine, the European Union proposed a $158 billion fund to bolster military spending and support Kyiv.

Ukraine has depended on a lifeline of arms from the United States since the day after Russian troops crossed the border in February 2022, when the Biden administration authorized $350 million worth of arms from the Defense Department’s stockpiles for Ukraine.