At least a dozen foreign volunteers in Ukraine’s military were killed late last month when a Russian missile struck a training camp’s mess hall during lunchtime, in one of the deadliest attacks on foreign fighters of the war.The attack showed the risks that Ukraine has faced throughout the war when it has assembled soldiers at places like military academies, barracks and parade grounds, making them targets for Russian attacks. Ukraine has been deploying foreign troops to bolster its forces against Russia’s larger and better-armed military, which has bombarded the country daily even as President Vladimir V. Putin plans to meet with President Trump on Friday in Alaska to discuss an end to the war. Is Ukraine desperate to hold on ?

