U.S. military aid for Ukraine has been paused following the spectacular falling-out between President Donald Trump and Ukraine's Volodymyr Zelenskyy.

The U.S. move won’t have an immediate impact on the battlefield, where Kyiv’s forces are struggling to stem a relentless Russian offensive in eastern Ukraine. Ukrainian forces have slowed Russian advances along the roughly 1,000-kilometer (600-mile) front line, where Russia is slowly gaining ground at a huge human and material cost.

Officials in Kyiv, however, said they were grateful for vital U.S. help in the war and want to keep working with Washington.