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

Ukrainians expressed alarm and apprehension at a U.S. decision to pause military aid that is critical to their fighting Russia’s invasion.

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.